unbrice/py1

py1 aims at being "Python's Awk"

Tutorial

This is an excerpt, you can find the full documentation on ReadTheDocs.

Installation

To install from Pypi:

pip install py1cmd

Introduction

One should use the right tool for the right task. But Learning 300 tools is counterproductive, so one needs a fallback. To be generic enough that fallback must be scriptable. So we have AWK, Perl, Sed, TCL... and their read-only languages.

Enters py1, it aims at being a "Python AWK".

Indents and dedents can be replaced with {{ and }}, line feeds can be replaced with ;. An optional for loop iterates on input lines.

Usage

Using {{ }} instead of indentation, and ; to separate statements:

py1 "a = 1+2; if a > 4: {{ print(a) }}"

The wrapper script defines a convenient set of 1&2-letters variables and functions. It can also include a for loop that iterates on input lines. To get the for loop, pass --each-line/-l.

For example, to count lines matching '$a*^':

py1 --begin "count=0" --each-line "if M('$a*^'): count += 1"
    --end "P(count)"

Lastly the wrapper script provide a short notation to easily import modules.

py1 --import "math/*" "P(cos(pi))"

To learn more you can read the list of one letter functions and variables or just look at examples and figure out the rest.

Sustainable hacking

If you find yourself writing a longer than readable one-liner, you can transform it in regular Python code, easily refactored for later reuse. Just add --code=full.

More!

Interested? You can install with:

pip install py1cmd

To learn more you can read the list of one letter functions and variables or just look at examples and figure out the rest.

How to contribute?

I wrote some advices and documented the internals here. Feel free to just contact unbrice.