Project P026
Temperature log
A day's temperature readings from up to six places: each place's lowest, highest and average, a moving average over 2 to 10 readings, and alerts for readings outside a place's safe range - when a reading comes in and in a list. Temperatures are kept in whole tenths of a degree, so the averages are exact until the display rounds them.
3 modules · 2 recorded sessionstext-menu UI in the terminalupdated 2026-10-05
Every screen below was recorded under CPython. When this page was built, the EML interpreter replayed each session from the same input and printed the same bytes.
About
A day's temperature readings from up to six places. For each place it shows the lowest, the highest and the average, a moving average over 2 to 10 readings, and alerts for readings outside the place's safe range: one as soon as such a reading comes in, and a list of all of them on request.
main.eml- the menu, the questions and their checks, and what the screen showsreadings.eml- the places and their readings: finding a place, keeping readings in time order, lowest/highest/total, how far a reading is outside a safe range, and the moving totalsunits.eml- reading and writing temperatures and times, the rounded average, lower case, padding, lists in words
How each part works:
- Temperatures are kept as whole tenths of a degree: 21.5 C is 215. Totals and moving totals are therefore exact, and only the display rounds: an average is the total over the count, rounded to a tenth with halves away from zero (-171.67 tenths is -17.2 C).
- Readings are kept in time order, whatever order they are typed in; a place has at most one reading per minute of the day.
- The moving average slides: each new reading is added to the running total and the reading that leaves the window is taken away. With floating point that running total would drift away from a fresh sum; in whole tenths it is always exactly the sum of the window.
- The lowest and the highest are the earliest when a value comes up again, and across places the first place added wins a tie.
- A safe range runs from a lowest to a highest temperature, both allowed. A reading below or above it is reported with how far outside it is.
What is checked: a place name is 1 to 16 letters, digits, spaces or hyphens, matched without regard to case; there are at most 6 places and 48 readings a place; a time is H:MM or HH:MM from 00:00 to 23:59, not already taken at that place; a temperature is -60.0 to 60.0 with at most one decimal; a safe range's highest is above its lowest; a window is 2 to 10 readings and no more than the place has. An empty answer cancels.
Sessions: sessions/basic.in logs a greenhouse (one reading typed out of order, one place name typed in lower case) and a freezer, sets both safe ranges, gets an alert at 31.5 C, and shows the summary, the moving average of 3 and the alerts, before and after a third place without a range; sessions/bad-input.in asks for a summary, a moving average and alerts with no readings, then types a name with #, times 25:00 and 7:5, temperatures abc, 61, -60.05 and 21.25, a reading at a time that is taken, a moving average with one reading, a place that does not exist, a safe range whose highest is not above its lowest, a seventh place, windows 1 and x, and a place's 49th reading.
Built on the verified corpus cases temperature-alert-system (readings compared with thresholds to raise alerts) and moving-average (a sliding total, and why a running float total drifts from a fresh sum).
Recorded sessions
What the screen shows while someone uses the program. Each typed line appears after its prompt, the way a terminal shows it.
bad-input
interpreter: byte-equal
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 0
Pick a number from 1 to 6.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> seven
Pick a number from 1 to 6.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 3
No readings yet.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 4
No readings yet.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 5
No readings yet.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 2
No places yet; add a reading first.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place>
Cancelled.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> Lab #1
A place name is 1 to 16 letters, digits, spaces or hyphens.
place> Lab
time (HH:MM)> 25:00
Type a time from 00:00 to 23:59, such as 07:30.
time (HH:MM)> 7:5
Type a time from 00:00 to 23:59, such as 07:30.
time (HH:MM)> 07:05
temperature (C)> abc
Type a temperature from -60.0 to 60.0 with at most one decimal, such as -3.5 or 21.
temperature (C)> 61
Type a temperature from -60.0 to 60.0 with at most one decimal, such as -3.5 or 21.
temperature (C)> -60.05
Type a temperature from -60.0 to 60.0 with at most one decimal, such as -3.5 or 21.
temperature (C)> 21.25
Type a temperature from -60.0 to 60.0 with at most one decimal, such as -3.5 or 21.
temperature (C)> -0.5
Recorded: Lab 07:05 -0.5 C - a new place.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> lab
time (HH:MM)> 7:05
Lab already has a reading at 07:05 (-0.5 C).
time (HH:MM)>
Cancelled.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 4
place> Lab
A moving average needs at least 2 readings; Lab has 1.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 2
place> Kitchen
There is no place called Kitchen yet; add a reading for it first.
place>
Cancelled.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 2
place> Lab
lowest (C)> 5
highest (C)> 5
The highest has to be above the lowest (5.0 C).
highest (C)> 4.9
The highest has to be above the lowest (5.0 C).
highest (C)>
Cancelled.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 5
No place has a safe range yet; set one with 2.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 12:00
temperature (C)> 10
Recorded: A 12:00 10.0 C - a new place.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> B
time (HH:MM)> 12:00
temperature (C)> 10
Recorded: B 12:00 10.0 C - a new place.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> C
time (HH:MM)> 12:00
temperature (C)> 10
Recorded: C 12:00 10.0 C - a new place.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> D
time (HH:MM)> 12:00
temperature (C)> 10
Recorded: D 12:00 10.0 C - a new place.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> E
time (HH:MM)> 12:00
temperature (C)> 10
Recorded: E 12:00 10.0 C - a new place.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> F
There are already 6 places; a reading has to go to one of them.
place>
Cancelled.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 2
place> Lab
lowest (C)> -1
highest (C)> 1
Lab's safe range: -1.0 to 1.0 C. Every reading so far is inside it.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 5
Every reading is inside its place's safe range.
No safe range yet: A, B, C, D and E.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> Lab
time (HH:MM)> 09:00
temperature (C)> 2
Recorded: Lab 09:00 2.0 C.
ALERT: 2.0 C is 1.0 above Lab's safe range of -1.0 to 1.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 4
place> Lab
window (2 to 2 readings)> 1
Type a whole number from 2 to 2.
window (2 to 2 readings)> x
Type a whole number from 2 to 2.
window (2 to 2 readings)> 2
Lab, moving average of the last 2 readings:
07:05 -0.5
09:00 2.0 average 0.8
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 3
Lab: 2 readings, 07:05 to 09:00
lowest -0.5 C at 07:05, highest 2.0 C at 09:00, average 0.8 C
safe range -1.0 to 1.0 C, 1 reading outside it
A: 1 reading, at 12:00
lowest 10.0 C at 12:00, highest 10.0 C at 12:00, average 10.0 C
no safe range
B: 1 reading, at 12:00
lowest 10.0 C at 12:00, highest 10.0 C at 12:00, average 10.0 C
no safe range
C: 1 reading, at 12:00
lowest 10.0 C at 12:00, highest 10.0 C at 12:00, average 10.0 C
no safe range
D: 1 reading, at 12:00
lowest 10.0 C at 12:00, highest 10.0 C at 12:00, average 10.0 C
no safe range
E: 1 reading, at 12:00
lowest 10.0 C at 12:00, highest 10.0 C at 12:00, average 10.0 C
no safe range
All places: 7 readings; lowest -0.5 C (Lab, 07:05), highest 10.0 C (A, 12:00).
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 00:00
temperature (C)> 0
Recorded: A 00:00 0.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 00:30
temperature (C)> 1
Recorded: A 00:30 1.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 01:00
temperature (C)> 2
Recorded: A 01:00 2.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 01:30
temperature (C)> 3
Recorded: A 01:30 3.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 02:00
temperature (C)> 4
Recorded: A 02:00 4.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 02:30
temperature (C)> 5
Recorded: A 02:30 5.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 03:00
temperature (C)> 6
Recorded: A 03:00 6.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 03:30
temperature (C)> 0
Recorded: A 03:30 0.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 04:00
temperature (C)> 1
Recorded: A 04:00 1.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 04:30
temperature (C)> 2
Recorded: A 04:30 2.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 05:00
temperature (C)> 3
Recorded: A 05:00 3.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 05:30
temperature (C)> 4
Recorded: A 05:30 4.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 06:00
temperature (C)> 5
Recorded: A 06:00 5.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 06:30
temperature (C)> 6
Recorded: A 06:30 6.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 07:00
temperature (C)> 0
Recorded: A 07:00 0.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 07:30
temperature (C)> 1
Recorded: A 07:30 1.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 08:00
temperature (C)> 2
Recorded: A 08:00 2.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 08:30
temperature (C)> 3
Recorded: A 08:30 3.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 09:00
temperature (C)> 4
Recorded: A 09:00 4.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 09:30
temperature (C)> 5
Recorded: A 09:30 5.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 10:00
temperature (C)> 6
Recorded: A 10:00 6.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 10:30
temperature (C)> 0
Recorded: A 10:30 0.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 11:00
temperature (C)> 1
Recorded: A 11:00 1.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 11:30
temperature (C)> 2
Recorded: A 11:30 2.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 12:30
temperature (C)> 4
Recorded: A 12:30 4.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 13:00
temperature (C)> 5
Recorded: A 13:00 5.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 13:30
temperature (C)> 6
Recorded: A 13:30 6.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 14:00
temperature (C)> 0
Recorded: A 14:00 0.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 14:30
temperature (C)> 1
Recorded: A 14:30 1.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 15:00
temperature (C)> 2
Recorded: A 15:00 2.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 15:30
temperature (C)> 3
Recorded: A 15:30 3.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 16:00
temperature (C)> 4
Recorded: A 16:00 4.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 16:30
temperature (C)> 5
Recorded: A 16:30 5.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 17:00
temperature (C)> 6
Recorded: A 17:00 6.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 17:30
temperature (C)> 0
Recorded: A 17:30 0.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 18:00
temperature (C)> 1
Recorded: A 18:00 1.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 18:30
temperature (C)> 2
Recorded: A 18:30 2.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 19:00
temperature (C)> 3
Recorded: A 19:00 3.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 19:30
temperature (C)> 4
Recorded: A 19:30 4.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 20:00
temperature (C)> 5
Recorded: A 20:00 5.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 20:30
temperature (C)> 6
Recorded: A 20:30 6.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 21:00
temperature (C)> 0
Recorded: A 21:00 0.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 21:30
temperature (C)> 1
Recorded: A 21:30 1.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 22:00
temperature (C)> 2
Recorded: A 22:00 2.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 22:30
temperature (C)> 3
Recorded: A 22:30 3.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 23:00
temperature (C)> 4
Recorded: A 23:00 4.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
time (HH:MM)> 23:30
temperature (C)> 5
Recorded: A 23:30 5.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> A
A already has 48 readings, the most a place keeps.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 6
Bye.
What was typed (264 lines)
0
seven
3
4
5
2
1
1
Lab #1
Lab
25:00
7:5
07:05
abc
61
-60.05
21.25
-0.5
1
lab
7:05
4
Lab
2
Kitchen
2
Lab
5
5
4.9
5
1
A
12:00
10
1
B
12:00
10
1
C
12:00
10
1
D
12:00
10
1
E
12:00
10
1
F
2
Lab
-1
1
5
1
Lab
09:00
2
4
Lab
1
x
2
3
1
A
00:00
0
1
A
00:30
1
1
A
01:00
2
1
A
01:30
3
1
A
02:00
4
1
A
02:30
5
1
A
03:00
6
1
A
03:30
0
1
A
04:00
1
1
A
04:30
2
1
A
05:00
3
1
A
05:30
4
1
A
06:00
5
1
A
06:30
6
1
A
07:00
0
1
A
07:30
1
1
A
08:00
2
1
A
08:30
3
1
A
09:00
4
1
A
09:30
5
1
A
10:00
6
1
A
10:30
0
1
A
11:00
1
1
A
11:30
2
1
A
12:30
4
1
A
13:00
5
1
A
13:30
6
1
A
14:00
0
1
A
14:30
1
1
A
15:00
2
1
A
15:30
3
1
A
16:00
4
1
A
16:30
5
1
A
17:00
6
1
A
17:30
0
1
A
18:00
1
1
A
18:30
2
1
A
19:00
3
1
A
19:30
4
1
A
20:00
5
1
A
20:30
6
1
A
21:00
0
1
A
21:30
1
1
A
22:00
2
1
A
22:30
3
1
A
23:00
4
1
A
23:30
5
1
A
6
basic
interpreter: byte-equal
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> Greenhouse
time (HH:MM)> 06:30
temperature (C)> 12.5
Recorded: Greenhouse 06:30 12.5 C - a new place.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> Greenhouse
time (HH:MM)> 8:00
temperature (C)> 15
Recorded: Greenhouse 08:00 15.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> greenhouse
time (HH:MM)> 14:00
temperature (C)> 28.0
Recorded: Greenhouse 14:00 28.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> Greenhouse
time (HH:MM)> 10:00
temperature (C)> 19
Recorded: Greenhouse 10:00 19.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> Freezer
time (HH:MM)> 08:00
temperature (C)> -21
Recorded: Freezer 08:00 -21.0 C - a new place.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> Freezer
time (HH:MM)> 14:00
temperature (C)> -12
Recorded: Freezer 14:00 -12.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> Freezer
time (HH:MM)> 11:30
temperature (C)> -18.5
Recorded: Freezer 11:30 -18.5 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 2
place> Greenhouse
lowest (C)> 15
highest (C)> 30
Greenhouse's safe range: 15.0 to 30.0 C. 1 of its 4 readings is outside it.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 2
place> Freezer
lowest (C)> -25
highest (C)> -15
Freezer's safe range: -25.0 to -15.0 C. 1 of its 3 readings is outside it.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> Greenhouse
time (HH:MM)> 16:30
temperature (C)> 31.5
Recorded: Greenhouse 16:30 31.5 C.
ALERT: 31.5 C is 1.5 above Greenhouse's safe range of 15.0 to 30.0 C.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 3
Greenhouse: 5 readings, 06:30 to 16:30
lowest 12.5 C at 06:30, highest 31.5 C at 16:30, average 21.2 C
safe range 15.0 to 30.0 C, 2 readings outside it
Freezer: 3 readings, 08:00 to 14:00
lowest -21.0 C at 08:00, highest -12.0 C at 14:00, average -17.2 C
safe range -25.0 to -15.0 C, 1 reading outside it
All places: 8 readings; lowest -21.0 C (Freezer, 08:00), highest 31.5 C (Greenhouse, 16:30).
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 4
place> Greenhouse
window (2 to 5 readings)> 3
Greenhouse, moving average of the last 3 readings:
06:30 12.5
08:00 15.0
10:00 19.0 average 15.5
14:00 28.0 average 20.7
16:30 31.5 average 26.2
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 5
Outside the safe ranges:
Greenhouse 06:30 12.5 C, 2.5 below 15.0
Greenhouse 16:30 31.5 C, 1.5 above 30.0
Freezer 14:00 -12.0 C, 3.0 above -15.0
3 of 8 readings at places with a safe range are outside it.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 1
place> Hall
time (HH:MM)> 12:00
temperature (C)> 21.5
Recorded: Hall 12:00 21.5 C - a new place.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 5
Outside the safe ranges:
Greenhouse 06:30 12.5 C, 2.5 below 15.0
Greenhouse 16:30 31.5 C, 1.5 above 30.0
Freezer 14:00 -12.0 C, 3.0 above -15.0
3 of 8 readings at places with a safe range are outside it.
No safe range yet: Hall.
== Temperature log ==
1) add a reading 2) set a safe range 3) summary
4) moving average 5) alerts 6) quit
choice> 6
Bye.
What was typed (51 lines)
1
Greenhouse
06:30
12.5
1
Greenhouse
8:00
15
1
greenhouse
14:00
28.0
1
Greenhouse
10:00
19
1
Freezer
08:00
-21
1
Freezer
14:00
-12
1
Freezer
11:30
-18.5
2
Greenhouse
15
30
2
Freezer
-25
-15
1
Greenhouse
16:30
31.5
3
4
Greenhouse
3
5
1
Hall
12:00
21.5
5
6
Modules
The program as written, entry module first. Each module transpiles to its own Python file, which is what eml project run executes.
main.eml(entry)
eml# P026 temperature log: readings from several places over one day, each
# place's lowest, highest and average, a moving average, and alerts for
# readings outside a place's safe range.
import readings
import units
6 => most_places
48 => most_readings
def good_name(s):
# 1 to 16 letters, digits, spaces or hyphens.
if s == "" or len(s) > 16:
return False
for c in s:
if not (c in "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789 -"):
return False
return True
def ask_place(places, must_exist):
# [index, name]: the index of a known place, or len(places) for a new one
# (only when must_exist is False); [-1, ""] when the answer is empty,
# which cancels.
while True:
units.trim(input("place> ")) => name
if name == "":
return [0 - 1, ""]
readings.find(places, name) => i
if not good_name(name):
"A place name is 1 to 16 letters, digits, spaces or hyphens." ^0
elif i >= 0:
return [i, places[i][0]]
elif must_exist:
("There is no place called " + name + " yet; add a reading for it first.") ^0
elif len(places) >= most_places:
("There are already " + str(most_places) + " places; a reading has to go to one of them.") ^0
else:
return [len(places), name]
def ask_temperature(prompt):
# [True, tenths], or [False, 0] when the answer is empty, which cancels.
while True:
input(prompt) => answer
if units.trim(answer) == "":
return [False, 0]
units.temperature(answer) => t
if t[0]:
return t
"Type a temperature from -60.0 to 60.0 with at most one decimal, such as -3.5 or 21." ^0
def range_text(place):
return units.show(place[3]) + " to " + units.show(place[4]) + " C"
def add_reading(places):
# Returns the places, with a new one if the reading started a place.
ask_place(places, False) => answer
answer[0] => i
if i == 0 - 1:
"Cancelled." ^0
return places
if i < len(places) and len(places[i][1]) >= most_readings:
(places[i][0] + " already has " + str(most_readings) + " readings, the most a place keeps.") ^0
return places
0 - 1 => minute
while minute == 0 - 1:
input("time (HH:MM)> ") => typed
if units.trim(typed) == "":
"Cancelled." ^0
return places
units.minute_of(typed) => minute
if minute == 0 - 1:
"Type a time from 00:00 to 23:59, such as 07:30." ^0
elif i < len(places) and readings.reading_at(places[i][1], minute) >= 0:
places[i][1][readings.reading_at(places[i][1], minute)] => there
(places[i][0] + " already has a reading at " + units.clock(minute) + " (" + units.show(there[1]) + " C).") ^0
0 - 1 => minute
ask_temperature("temperature (C)> ") => t
if not t[0]:
"Cancelled." ^0
return places
if i == len(places):
places + [[answer[1], [[minute, t[1]]], False, 0, 0]] => places
places[i] => place
("Recorded: " + place[0] + " " + units.clock(minute) + " " + units.show(t[1]) + " C - a new place.") ^0
else:
places[i] => place
readings.with_reading(place[1], minute, t[1]) => place[1]
("Recorded: " + place[0] + " " + units.clock(minute) + " " + units.show(t[1]) + " C.") ^0
readings.off_range(place, t[1]) => off
if off < 0:
("ALERT: " + units.show(t[1]) + " C is " + units.show(0 - off) + " below " + place[0] + "'s safe range of " + range_text(place) + ".") ^0
elif off > 0:
("ALERT: " + units.show(t[1]) + " C is " + units.show(off) + " above " + place[0] + "'s safe range of " + range_text(place) + ".") ^0
return places
def set_range(places):
if len(places) == 0:
"No places yet; add a reading first." ^0
return
ask_place(places, True)[0] => i
if i == 0 - 1:
"Cancelled." ^0
return
places[i] => place
ask_temperature("lowest (C)> ") => low
if not low[0]:
"Cancelled." ^0
return
[False, 0] => high
while not high[0]:
ask_temperature("highest (C)> ") => high
if not high[0]:
"Cancelled." ^0
return
if high[1] <= low[1]:
("The highest has to be above the lowest (" + units.show(low[1]) + " C).") ^0
[False, 0] => high
True => place[2]
low[1] => place[3]
high[1] => place[4]
readings.count_outside(place) => n
len(place[1]) => total
if n == 0:
"Every reading so far is inside it." => message
elif n == total:
"Every reading so far is outside it." => message
elif n == 1:
("1 of its " + str(total) + " readings is outside it.") => message
else:
(str(n) + " of its " + str(total) + " readings are outside it.") => message
(place[0] + "'s safe range: " + range_text(place) + ". " + message) ^0
def summary(places):
if len(places) == 0:
"No readings yet." ^0
return
0 => all_count
for place in places:
readings.stats(place[1]) => s
place[1] => rs
if s[0] == 1:
(place[0] + ": 1 reading, at " + units.clock(rs[0][0])) ^0
else:
(place[0] + ": " + str(s[0]) + " readings, " + units.clock(rs[0][0]) + " to " + units.clock(rs[len(rs) - 1][0])) ^0
(" lowest " + units.show(s[1]) + " C at " + units.clock(s[2]) + ", highest " + units.show(s[3]) + " C at " + units.clock(s[4]) + ", average " + units.show(units.average(s[5], s[0])) + " C") ^0
if place[2]:
(" safe range " + range_text(place) + ", " + units.plural(readings.count_outside(place), "reading") + " outside it") ^0
else:
" no safe range" ^0
all_count + s[0] => all_count
if len(places) > 1:
readings.stats(places[0][1]) => first
first[1] => low
first[2] => low_at
places[0][0] => low_place
first[3] => high
first[4] => high_at
places[0][0] => high_place
for place in places:
readings.stats(place[1]) => s
if s[1] < low:
s[1] => low
s[2] => low_at
place[0] => low_place
if s[3] > high:
s[3] => high
s[4] => high_at
place[0] => high_place
("All places: " + str(all_count) + " readings; lowest " + units.show(low) + " C (" + low_place + ", " + units.clock(low_at) + "), highest " + units.show(high) + " C (" + high_place + ", " + units.clock(high_at) + ").") ^0
def moving_average(places):
if len(places) == 0:
"No readings yet." ^0
return
ask_place(places, True)[0] => i
if i == 0 - 1:
"Cancelled." ^0
return
places[i] => place
len(place[1]) => count
if count < 2:
("A moving average needs at least 2 readings; " + place[0] + " has 1.") ^0
return
count => widest
if widest > 10:
10 => widest
0 => window
while window == 0:
input("window (2 to " + str(widest) + " readings)> ") => typed
if units.trim(typed) == "":
"Cancelled." ^0
return
units.whole_number(typed) => window
if window < 2 or window > widest:
("Type a whole number from 2 to " + str(widest) + ".") ^0
0 => window
(place[0] + ", moving average of the last " + str(window) + " readings:") ^0
for row in readings.moving(place[1], window):
(" " + units.clock(row[0]) + units.pad_left(units.show(row[1]), 7)) => line
if row[2] != None:
line + " average " + units.show(units.average(row[2], window)) => line
line ^0
def alerts(places):
if len(places) == 0:
"No readings yet." ^0
return
[] => lines
0 => checked
[] => unranged
for place in places:
if place[2]:
for r in place[1]:
readings.off_range(place, r[1]) => off
checked + 1 => checked
if off < 0:
lines + [" " + place[0] + " " + units.clock(r[0]) + " " + units.show(r[1]) + " C, " + units.show(0 - off) + " below " + units.show(place[3])] => lines
elif off > 0:
lines + [" " + place[0] + " " + units.clock(r[0]) + " " + units.show(r[1]) + " C, " + units.show(off) + " above " + units.show(place[4])] => lines
else:
unranged + [place[0]] => unranged
if checked == 0:
"No place has a safe range yet; set one with 2." ^0
return
if len(lines) == 0:
"Every reading is inside its place's safe range." ^0
else:
"Outside the safe ranges:" ^0
for line in lines:
line ^0
if len(lines) == 1:
("1 of " + units.plural(checked, "reading") + " at places with a safe range is outside it.") ^0
else:
(str(len(lines)) + " of " + units.plural(checked, "reading") + " at places with a safe range are outside it.") ^0
if len(unranged) > 0:
("No safe range yet: " + units.listed(unranged) + ".") ^0
[] => places
True => running
while running:
"" ^0
"== Temperature log ==" ^0
"1) add a reading 2) set a safe range 3) summary" ^0
"4) moving average 5) alerts 6) quit" ^0
units.trim(input("choice> ")) => choice
if choice == "1":
add_reading(places) => places
elif choice == "2":
set_range(places)
elif choice == "3":
summary(places)
elif choice == "4":
moving_average(places)
elif choice == "5":
alerts(places)
elif choice == "6":
False => running
else:
"Pick a number from 1 to 6." ^0
"Bye." ^0
Python projection (main.py)
import readings
import units
most_places = 6
most_readings = 48
def good_name(s):
if s == "" or len(s) > 16:
return False
for c in s:
if not c in "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789 -":
return False
return True
def ask_place(places, must_exist):
while True:
name = units.trim(input("place> "))
if name == "":
return [0 - 1, ""]
i = readings.find(places, name)
if not good_name(name):
print("A place name is 1 to 16 letters, digits, spaces or hyphens.")
elif i >= 0:
return [i, places[i][0]]
elif must_exist:
print("There is no place called " + name + " yet; add a reading for it first.")
elif len(places) >= most_places:
print("There are already " + str(most_places) + " places; a reading has to go to one of them.")
else:
return [len(places), name]
def ask_temperature(prompt):
while True:
answer = input(prompt)
if units.trim(answer) == "":
return [False, 0]
t = units.temperature(answer)
if t[0]:
return t
print("Type a temperature from -60.0 to 60.0 with at most one decimal, such as -3.5 or 21.")
def range_text(place):
return units.show(place[3]) + " to " + units.show(place[4]) + " C"
def add_reading(places):
answer = ask_place(places, False)
i = answer[0]
if i == 0 - 1:
print("Cancelled.")
return places
if i < len(places) and len(places[i][1]) >= most_readings:
print(places[i][0] + " already has " + str(most_readings) + " readings, the most a place keeps.")
return places
minute = 0 - 1
while minute == 0 - 1:
typed = input("time (HH:MM)> ")
if units.trim(typed) == "":
print("Cancelled.")
return places
minute = units.minute_of(typed)
if minute == 0 - 1:
print("Type a time from 00:00 to 23:59, such as 07:30.")
elif i < len(places) and readings.reading_at(places[i][1], minute) >= 0:
there = places[i][1][readings.reading_at(places[i][1], minute)]
print(places[i][0] + " already has a reading at " + units.clock(minute) + " (" + units.show(there[1]) + " C).")
minute = 0 - 1
t = ask_temperature("temperature (C)> ")
if not t[0]:
print("Cancelled.")
return places
if i == len(places):
places = places + [[answer[1], [[minute, t[1]]], False, 0, 0]]
place = places[i]
print("Recorded: " + place[0] + " " + units.clock(minute) + " " + units.show(t[1]) + " C - a new place.")
else:
place = places[i]
place[1] = readings.with_reading(place[1], minute, t[1])
print("Recorded: " + place[0] + " " + units.clock(minute) + " " + units.show(t[1]) + " C.")
off = readings.off_range(place, t[1])
if off < 0:
print("ALERT: " + units.show(t[1]) + " C is " + units.show(0 - off) + " below " + place[0] + "'s safe range of " + range_text(place) + ".")
elif off > 0:
print("ALERT: " + units.show(t[1]) + " C is " + units.show(off) + " above " + place[0] + "'s safe range of " + range_text(place) + ".")
return places
def set_range(places):
if len(places) == 0:
print("No places yet; add a reading first.")
return
i = ask_place(places, True)[0]
if i == 0 - 1:
print("Cancelled.")
return
place = places[i]
low = ask_temperature("lowest (C)> ")
if not low[0]:
print("Cancelled.")
return
high = [False, 0]
while not high[0]:
high = ask_temperature("highest (C)> ")
if not high[0]:
print("Cancelled.")
return
if high[1] <= low[1]:
print("The highest has to be above the lowest (" + units.show(low[1]) + " C).")
high = [False, 0]
place[2] = True
place[3] = low[1]
place[4] = high[1]
n = readings.count_outside(place)
total = len(place[1])
if n == 0:
message = "Every reading so far is inside it."
elif n == total:
message = "Every reading so far is outside it."
elif n == 1:
message = "1 of its " + str(total) + " readings is outside it."
else:
message = str(n) + " of its " + str(total) + " readings are outside it."
print(place[0] + "'s safe range: " + range_text(place) + ". " + message)
def summary(places):
if len(places) == 0:
print("No readings yet.")
return
all_count = 0
for place in places:
s = readings.stats(place[1])
rs = place[1]
if s[0] == 1:
print(place[0] + ": 1 reading, at " + units.clock(rs[0][0]))
else:
print(place[0] + ": " + str(s[0]) + " readings, " + units.clock(rs[0][0]) + " to " + units.clock(rs[len(rs) - 1][0]))
print(" lowest " + units.show(s[1]) + " C at " + units.clock(s[2]) + ", highest " + units.show(s[3]) + " C at " + units.clock(s[4]) + ", average " + units.show(units.average(s[5], s[0])) + " C")
if place[2]:
print(" safe range " + range_text(place) + ", " + units.plural(readings.count_outside(place), "reading") + " outside it")
else:
print(" no safe range")
all_count = all_count + s[0]
if len(places) > 1:
first = readings.stats(places[0][1])
low = first[1]
low_at = first[2]
low_place = places[0][0]
high = first[3]
high_at = first[4]
high_place = places[0][0]
for place in places:
s = readings.stats(place[1])
if s[1] < low:
low = s[1]
low_at = s[2]
low_place = place[0]
if s[3] > high:
high = s[3]
high_at = s[4]
high_place = place[0]
print("All places: " + str(all_count) + " readings; lowest " + units.show(low) + " C (" + low_place + ", " + units.clock(low_at) + "), highest " + units.show(high) + " C (" + high_place + ", " + units.clock(high_at) + ").")
def moving_average(places):
if len(places) == 0:
print("No readings yet.")
return
i = ask_place(places, True)[0]
if i == 0 - 1:
print("Cancelled.")
return
place = places[i]
count = len(place[1])
if count < 2:
print("A moving average needs at least 2 readings; " + place[0] + " has 1.")
return
widest = count
if widest > 10:
widest = 10
window = 0
while window == 0:
typed = input("window (2 to " + str(widest) + " readings)> ")
if units.trim(typed) == "":
print("Cancelled.")
return
window = units.whole_number(typed)
if window < 2 or window > widest:
print("Type a whole number from 2 to " + str(widest) + ".")
window = 0
print(place[0] + ", moving average of the last " + str(window) + " readings:")
for row in readings.moving(place[1], window):
line = " " + units.clock(row[0]) + units.pad_left(units.show(row[1]), 7)
if row[2] != None:
line = line + " average " + units.show(units.average(row[2], window))
print(line)
def alerts(places):
if len(places) == 0:
print("No readings yet.")
return
lines = []
checked = 0
unranged = []
for place in places:
if place[2]:
for r in place[1]:
off = readings.off_range(place, r[1])
checked = checked + 1
if off < 0:
lines = lines + [" " + place[0] + " " + units.clock(r[0]) + " " + units.show(r[1]) + " C, " + units.show(0 - off) + " below " + units.show(place[3])]
elif off > 0:
lines = lines + [" " + place[0] + " " + units.clock(r[0]) + " " + units.show(r[1]) + " C, " + units.show(off) + " above " + units.show(place[4])]
else:
unranged = unranged + [place[0]]
if checked == 0:
print("No place has a safe range yet; set one with 2.")
return
if len(lines) == 0:
print("Every reading is inside its place's safe range.")
else:
print("Outside the safe ranges:")
for line in lines:
print(line)
if len(lines) == 1:
print("1 of " + units.plural(checked, "reading") + " at places with a safe range is outside it.")
else:
print(str(len(lines)) + " of " + units.plural(checked, "reading") + " at places with a safe range are outside it.")
if len(unranged) > 0:
print("No safe range yet: " + units.listed(unranged) + ".")
places = []
running = True
while running:
print("")
print("== Temperature log ==")
print("1) add a reading 2) set a safe range 3) summary")
print("4) moving average 5) alerts 6) quit")
choice = units.trim(input("choice> "))
if choice == "1":
places = add_reading(places)
elif choice == "2":
set_range(places)
elif choice == "3":
summary(places)
elif choice == "4":
moving_average(places)
elif choice == "5":
alerts(places)
elif choice == "6":
running = False
else:
print("Pick a number from 1 to 6.")
print("Bye.")
readings.eml
eml# P026 temperature log - the places and their readings. A place is
# [name, readings, has_range, lowest, highest]; its readings are
# [minute, tenths] pairs kept in time order, one per minute of the day.
import units
def find(places, name):
# The index of the place with this name, ignoring case; -1 if none.
units.lower(name) => wanted
0 => i
while i < len(places):
if units.lower(places[i][0]) == wanted:
return i
i + 1 => i
return 0 - 1
def reading_at(readings, minute):
# The index of the reading taken at this minute; -1 if none.
0 => i
while i < len(readings):
if readings[i][0] == minute:
return i
i + 1 => i
return 0 - 1
def with_reading(readings, minute, tenths):
# The readings with one more, still in time order.
0 => k
while k < len(readings) and readings[k][0] < minute:
k + 1 => k
return readings[0:k] + [[minute, tenths]] + readings[k:len(readings)]
def stats(readings):
# [count, lowest, its minute, highest, its minute, total]; the earliest
# reading counts when a lowest or highest value comes up again.
readings[0] => first
first[1] => low
first[0] => low_at
first[1] => high
first[0] => high_at
0 => total
for r in readings:
if r[1] < low:
r[1] => low
r[0] => low_at
if r[1] > high:
r[1] => high
r[0] => high_at
total + r[1] => total
return [len(readings), low, low_at, high, high_at, total]
def off_range(place, tenths):
# How far a reading is outside the place's safe range: below is negative,
# above is positive, inside (or no range) is 0.
if not place[2]:
return 0
if tenths < place[3]:
return tenths - place[3]
if tenths > place[4]:
return tenths - place[4]
return 0
def count_outside(place):
0 => n
for r in place[1]:
if off_range(place, r[1]) != 0:
n + 1 => n
return n
def moving(readings, window):
# For each reading [minute, tenths, total of the last `window` readings or
# None while fewer have come]. The total slides: the entering reading is
# added and the leaving one taken away, in whole tenths, so it never drifts.
[] => out
0 => total
0 => i
while i < len(readings):
total + readings[i][1] => total
if i >= window:
total - readings[i - window][1] => total
if i >= window - 1:
out + [[readings[i][0], readings[i][1], total]] => out
else:
out + [[readings[i][0], readings[i][1], None]] => out
i + 1 => i
return out
Python projection (readings.py)
import units
def find(places, name):
wanted = units.lower(name)
i = 0
while i < len(places):
if units.lower(places[i][0]) == wanted:
return i
i = i + 1
return 0 - 1
def reading_at(readings, minute):
i = 0
while i < len(readings):
if readings[i][0] == minute:
return i
i = i + 1
return 0 - 1
def with_reading(readings, minute, tenths):
k = 0
while k < len(readings) and readings[k][0] < minute:
k = k + 1
return readings[0:k] + [[minute, tenths]] + readings[k:len(readings)]
def stats(readings):
first = readings[0]
low = first[1]
low_at = first[0]
high = first[1]
high_at = first[0]
total = 0
for r in readings:
if r[1] < low:
low = r[1]
low_at = r[0]
if r[1] > high:
high = r[1]
high_at = r[0]
total = total + r[1]
return [len(readings), low, low_at, high, high_at, total]
def off_range(place, tenths):
if not place[2]:
return 0
if tenths < place[3]:
return tenths - place[3]
if tenths > place[4]:
return tenths - place[4]
return 0
def count_outside(place):
n = 0
for r in place[1]:
if off_range(place, r[1]) != 0:
n = n + 1
return n
def moving(readings, window):
out = []
total = 0
i = 0
while i < len(readings):
total = total + readings[i][1]
if i >= window:
total = total - readings[i - window][1]
if i >= window - 1:
out = out + [[readings[i][0], readings[i][1], total]]
else:
out = out + [[readings[i][0], readings[i][1], None]]
i = i + 1
return out
units.eml
eml# P026 temperature log - reading and writing temperatures and times.
# Temperatures are kept as whole tenths of a degree (21.5 C is 215), so sums
# and averages are exact; only the display rounds. The interpreter that checks
# every session does not run string methods yet, so the text handling is
# written out here.
"0123456789" => digits
def trim(s):
0 => i
len(s) => j
while i < j and s[i] == " ":
i + 1 => i
while j > i and s[j - 1] == " ":
j - 1 => j
return s[i:j]
def lower(s):
# s with A-Z as a-z.
"ABCDEFGHIJKLMNOPQRSTUVWXYZ" => upper
"abcdefghijklmnopqrstuvwxyz" => small
"" => out
for c in s:
0 => k
while k < 26 and upper[k] != c:
k + 1 => k
if k < 26:
out + small[k] => out
else:
out + c => out
return out
def quotient(a, b):
# a divided by b, rounded down, for a >= 0 and b > 0.
return int((a - a % b) / b)
def average(total, count):
# total / count rounded to a whole number, halves away from zero.
if total < 0:
return 0 - quotient(0 - 2 * total + count, 2 * count)
return quotient(2 * total + count, 2 * count)
def show(tenths):
# 215 as "21.5", -5 as "-0.5", 0 as "0.0".
"" => sign
tenths => a
if a < 0:
"-" => sign
0 - a => a
return sign + str(quotient(a, 10)) + "." + str(a % 10)
def temperature(s):
# [True, tenths] for "21", "21.5", "-3.5" or "+4" from -60.0 to 60.0 with
# at most one decimal; [False, 0] for anything else.
trim(s) => s
1 => sign
if s != "" and (s[0] == "-" or s[0] == "+"):
if s[0] == "-":
0 - 1 => sign
s[1:len(s)] => s
0 => whole
0 => n
while n < len(s) and s[n] in digits:
whole * 10 + int(s[n]) => whole
n + 1 => n
if n == 0 or n > 2:
return [False, 0]
0 => tenth
if n < len(s):
if s[n] != "." or n + 2 != len(s) or not (s[n + 1] in digits):
return [False, 0]
int(s[n + 1]) => tenth
sign * (whole * 10 + tenth) => t
if t < 0 - 600 or t > 600:
return [False, 0]
return [True, t]
def minute_of(s):
# Minutes after midnight for "7:05" or "07:05" (00:00 to 23:59), else -1.
trim(s) => s
0 => colon
while colon < len(s) and s[colon] != ":":
colon + 1 => colon
if colon == 0 or colon > 2 or colon + 3 != len(s):
return 0 - 1
0 => h
for c in s[0:colon]:
if not (c in digits):
return 0 - 1
h * 10 + int(c) => h
if not (s[colon + 1] in digits and s[colon + 2] in digits):
return 0 - 1
int(s[colon + 1]) * 10 + int(s[colon + 2]) => m
if h > 23 or m > 59:
return 0 - 1
return h * 60 + m
def clock(minute):
# 425 as "07:05".
quotient(minute, 60) => h
minute % 60 => m
"" => out
if h < 10:
"0" => out
out + str(h) + ":" => out
if m < 10:
out + "0" => out
return out + str(m)
def pad_left(s, width):
while len(s) < width:
" " + s => s
return s
def plural(n, word):
if n == 1:
return "1 " + word
return str(n) + " " + word + "s"
def whole_number(s):
# The value of 1 to 3 digits; -1 for anything else.
trim(s) => s
if s == "" or len(s) > 3:
return 0 - 1
0 => n
for c in s:
if not (c in digits):
return 0 - 1
n * 10 + int(c) => n
return n
def listed(items):
# ["a", "b", "c"] as "a, b and c".
"" => out
0 => i
while i < len(items):
if i > 0 and i == len(items) - 1:
out + " and " => out
elif i > 0:
out + ", " => out
out + items[i] => out
i + 1 => i
return out
Python projection (units.py)
digits = "0123456789"
def trim(s):
i = 0
j = len(s)
while i < j and s[i] == " ":
i = i + 1
while j > i and s[j - 1] == " ":
j = j - 1
return s[i:j]
def lower(s):
upper = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
small = "abcdefghijklmnopqrstuvwxyz"
out = ""
for c in s:
k = 0
while k < 26 and upper[k] != c:
k = k + 1
if k < 26:
out = out + small[k]
else:
out = out + c
return out
def quotient(a, b):
return int((a - a % b) / b)
def average(total, count):
if total < 0:
return 0 - quotient(0 - 2 * total + count, 2 * count)
return quotient(2 * total + count, 2 * count)
def show(tenths):
sign = ""
a = tenths
if a < 0:
sign = "-"
a = 0 - a
return sign + str(quotient(a, 10)) + "." + str(a % 10)
def temperature(s):
s = trim(s)
sign = 1
if s != "" and (s[0] == "-" or s[0] == "+"):
if s[0] == "-":
sign = 0 - 1
s = s[1:len(s)]
whole = 0
n = 0
while n < len(s) and s[n] in digits:
whole = whole * 10 + int(s[n])
n = n + 1
if n == 0 or n > 2:
return [False, 0]
tenth = 0
if n < len(s):
if s[n] != "." or n + 2 != len(s) or not s[n + 1] in digits:
return [False, 0]
tenth = int(s[n + 1])
t = sign * (whole * 10 + tenth)
if t < 0 - 600 or t > 600:
return [False, 0]
return [True, t]
def minute_of(s):
s = trim(s)
colon = 0
while colon < len(s) and s[colon] != ":":
colon = colon + 1
if colon == 0 or colon > 2 or colon + 3 != len(s):
return 0 - 1
h = 0
for c in s[0:colon]:
if not c in digits:
return 0 - 1
h = h * 10 + int(c)
if not (s[colon + 1] in digits and s[colon + 2] in digits):
return 0 - 1
m = int(s[colon + 1]) * 10 + int(s[colon + 2])
if h > 23 or m > 59:
return 0 - 1
return h * 60 + m
def clock(minute):
h = quotient(minute, 60)
m = minute % 60
out = ""
if h < 10:
out = "0"
out = out + str(h) + ":"
if m < 10:
out = out + "0"
return out + str(m)
def pad_left(s, width):
while len(s) < width:
s = " " + s
return s
def plural(n, word):
if n == 1:
return "1 " + word
return str(n) + " " + word + "s"
def whole_number(s):
s = trim(s)
if s == "" or len(s) > 3:
return 0 - 1
n = 0
for c in s:
if not c in digits:
return 0 - 1
n = n * 10 + int(c)
return n
def listed(items):
out = ""
i = 0
while i < len(items):
if i > 0 and i == len(items) - 1:
out = out + " and "
elif i > 0:
out = out + ", "
out = out + items[i]
i = i + 1
return out