Run python expressions as commands. Inspired by the wonderful rb project by thisredone.
Here's an abridged (but functional!) version of the code:
#!/usr/bin/env python3
import argparse, base64, collections, collections.abc, csv, glob, gzip, json, math, os, os.path, platform, random, re, sys, time, urllib, uuid, zlib
def execute(_, expression):
return eval(expression)
for line in sys.stdin:
result = execute(line.strip(), sys.argv[1])
if result is not None:
print(result)Here's some examples:
# Filter lines outside a range
seq 1 100 | py "_ if 50 < int(_) < 60 else None"
# Retreive data from a CSV
cat demodata.csv | py -f "map(lambda l: l['weekdays'], csv.DictReader(_))"py's benefit is that it lets you write scripts in a language you're familiar with (python) and saves you from one you might make mistakes in (bash).
You have multiple options:
- Clone this repo and symlink
pyinto your path. - Run:
sudo curl https://raw.githubusercontent.com/Detry322/py/master/py -o /usr/local/bin/py && sudo chmod +x /usr/local/bin/py - Copy and paste the code from here into a file named
pyin your path.
usage: py [-h] [-g] [-f] [-s] [-n] expression
Run one-line python expressions on stdin. The expression has access to local
variable _, containing a single line of input. The expression
also has access to common python stdlib modules (sorted alphabetically):
argparse, base64, collections, csv, glob, gzip, json, math, os, os.path,
platform, random, re, sys, time, urllib, uuid, zlib
positional arguments:
expression The expression to run.
optional arguments:
-h, --help show this help message and exit
-g, --generator Pass stdin as a generator. _ returns stripped lines of
stdin
-f, --file Pass stdin as a file. _ is set to sys.stdin.
-s, --string Pass stdin as a string. _ is set to sys.stdin.read().
-n, --none Print None results.
Retreive data from a CSV
cat demodata.csv | py -f "map(lambda l: l['weekdays'], csv.DictReader(_))"Filter lines outside a range
seq 1 100 | py "_ if 50 < int(_) < 60 else None"Compress and output each file in the working directory
ls | py '"{}: {}".format(_, base64.b64encode(zlib.compress(open(_, "rb").read())).decode("ascii"))'
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