pyli

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 of the command line? pyli aims to make it easier to use python and all its batteries in conjunction with the shell.

Install

pyli is available from pypi via pip:

pip install pyli

You can also download the source directly:

git clone https://github.com/thenoviceoof/pyli.git
pip install pyli/

Unfortunately, type annotations mean the minimum supported Python version is 3.9.

Examples

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 some more complicated examples:

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
cat space_sep.dat | pyli "json.dumps(dict(parts))" >file.json

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'"

pyli

Features:

• Automatically import referred packages
• Populate special CLI oriented variables
  • line (li, l): Gives you access to each line
  • lines (lis, ls): Access to the line generator
  • contents (cont, cs): Gives you access to all of stdin in one string
  • part, (p): Gives you access to the different fields of a space-separated line
  • parts, (ps): Access to the part generator
  • stdin, stdout, stderr: A shortcut to sys.std* streams
  • Accept arbitrary GNU style arguments (-c, --blah), and make them available
  • Print last statement; if an assignment, print the value assigned to variable(s)
  • If we are using line/part, then print the last statement for each line

Do note that you should only access one of these special variables at a time: no work has been put into combining these into something that makes sense, so if you want multiple variables, you'll have to do the legwork yourself.

See the issue tracker.

Related Projects

In alphabetical order:

• funcpy
• Oneliner
• Pyle
• pyp

LICENSE

Copyright (c) <2014>

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.