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Better python CLI integration

Project description

Better scripting with python

Haven’t you ever missed writing perl one liners? Or maybe you’re more familiar with python than all the options of find, but like the text interaction paradigm? pyli aims to make it easier to use python and all it’s batteries in conjunction with your favorite hangout: the shell.


pyli is available via pip:

pip install pyli

Or directly via git and

git clone

cd pyli

sudo python


Let’s do some warmups:

pyli "2+2" # bc

cat file.txt | pyli "line if 'string' in line else None" # grep

cat file.txt | pyli "sum(len(l) + 1 for l in lines)" # wc -m

And now something more complicated:

log | pyli "str(time.time()) + ' ' + line" # time stamping a line

cat file.txt | pyli "set(w for s in nltk.sent_tokenize(contents) for w in nltk.word_tokenize)" # bag of words a file

cat file.json | pyli "pickle.dumps(json.loads(conts))" >file.pickle

Maybe it makes sense to separate commands:

cat index.html | pyli "for l in [a.get('href') for a in bs4.BeautifulSoup(cs).find_all('a')]: print l" | pyli --text='something' "r = requests.get(li); li if text in r.text else None"

cat index.html | pyli "hashlib.sha1(cs).hexdigest()" | pyli "encryptedfile.EncryptedFile(stdout, getpass.getpass()).write(cs)"

Perhaps you want to keep it a one liner, but Python is too opinionated to let you do that:

pyli -f "`ls -a`" "for l in f.split('\n'):" "    if '.git' == l: print 'git'"



  • Automatically import referred packages
  • Populate special CLI oriented variables
    • line (li, l)
    • lines (lis, ls)
    • contents (cont, cs)
    • stdin, stdout, stderr
    • Accept arbitrary GNU style arguments (-c, –blah), and make them available
    • Print last statement; if an assignment, print the assigned to variables
    • If we are using line, then print the last statement for each line


  • Move the engine to the nice-looking ast library
  • Make sure it works in more snakes than just 2.7.3

Also see the issue tracker


“THE BEER-WARE LICENSE” (Revision 42):

<thenoviceoof> wrote this file. As long as you retain this notice you can do whatever you want with this stuff. If we meet some day, and you think this stuff is worth it, you can buy me a beer in return

  • thenoviceoof

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