red 0.1.1

Python regex command-line tool, to replace functionality akin to 'perl -ne'.

Python regex command-line tool, to replace functionality akin to ‘perl -ne’.

Installation

From the project root directory:

$ python setup.py install

Usage

Use –help/-h to view info on the arguments:

$ red --help

Example usage:

$ cat test.txt
foo 1 bar 2
fiz 5 baz 10
funk 10 bunk 9
funk a bunk b
a b c d
aaaaa
bbbb
cc

Use it like grep:

$ cat test.txt | red "\w+ (\d+) \w+ (\d+)"
foo 1 bar 2
fiz 5 baz 10
funk 10 bunk 9

It works with path as argument as well, but the path must appear directly after the regex (oddity of argparse).:

$ red "\w+ (\d+) \w+ (\d+)" test.txt

Use it to evaluate Python code on groups stored in variable g:

$ red "\w+ (\d+) \w+ (\d+)" test.txt -e "int(g[0]) + int(g[1])"
3
15
19

Use it to aggregate across all of stdin, into list ag:

$ cat test.txt | red "\w+ (\d+) \w+ (\d+)" -a "sum([int(x[0]) for x in ag])"
16

Evaluate on each match, and aggregate against all matches:

$ cat test.txt | red "\w+ (\d+) \w+ (\d+)" -a "sum([int(x[0]) for x in ag])" -e "'adding {}'.format(g[0])"
adding 1
adding 5
adding 10
16

You can use named groups as well, stored in variables d and aggregated into ad1:

$ cat test.txt | red "\w+ (?P<first>\d+) \w+ \d+" -e "'first value is {first}'.format(**d)"
first value is 1
first value is 5
first value is 10

Release Notes

0.1.0:

Version is available on pypi, with functionality of evaluation and aggregation

0.0.1:

Project created