Added REPL mode

[Maltysen]

I found myself using Pyth for a lot of daily "desktop calculator" tasks, so I wrote a little REPL for it. This is called up when one has no cmd args, or uses the -r or --repl flags.

It just runs each line as a program, but sends the output of one into the other allowing things like:

>>> 6
6
>>> y
12
>>> 
24
>>> +3
27
>>> U
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26]

(Note that an empty line repeats the previous command).

It also uses the cmd module for up-arrow/down-arrow history functionality.

I also included help functionality that lookups the command you enter in the docs:

>>> help h
h  <num>                  A + 1.
>>> ? m
m  <l:d> <col/num>        Map A(_) over B. d -> k -> b ->

(help and ? are the same).

I made up the intro txt, flag name, etc. you probably want to change them, and there probably are some bugs.

[FliiFe]

This can only be aproved, there is no possible regression merging this (AFAIK).

Just a curiosity, why would you use pyth for daily calculation tasks while other languages (e.g python) have much more natural syntax ( 5+4, instead of +5 4) ?

[jakobkogler]

Probably because Pyth has more prebuild functions. It's easy to count the
number of occurences, make a run-lenth-encoding, convert a list of numbers
to a base, ... I often wished some of them are standard in Python.
Although a simpler solution would be to open the Python REPL and import all
methods from the file macros.py.

2016-06-23 16:30 GMT+02:00 Théophile Cailliau notifications@github.com:

This can only be aproved, there is no possible regression merging this
(AFAIK).

Just a curiosity, why would you use pyth for daily calculation tasks while
other languages (e.g python) have much more natural syntax ( 5+4, instead
of +5 4) ?

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[Maltysen]

@FliiFe pyth is a lot more powerful and flexible than other languages, for example, j vs python join. I also don't have to import anything, all the built-ins just "work" (e.g. with the itertools_norm) and everything being one character makes writing quick things very fast.

This obviously comes at the cost of maintainability, etc. but I find it really nice for small tasks.

[Maltysen]

Dammit, mobile I closed that by mistake when I hit "close and comment"

[isaacg1]

This is an impressively simple implementation of the repl.