Editing One-liner program (section)

===Python===
Performing one-liners directly on the Unix command line can be accomplished by using [[Python (programming language)|Python]]'s -cmd flag (-c for short), and typically requires the import of one or more modules. Statements are separated using ";" instead of newlines. For example, to print the last field of unix long listing:
 ls -l | python -c "<syntaxhighlight lang="python" inline>
import sys;[sys.stdout.write(' '.join([line.split(' ')[-1]])) for line in sys.stdin]</syntaxhighlight>"

====Python wrappers====
Several open-source scripts have been developed to facilitate the construction of Python one-liners. Scripts such as 
[http://code.google.com/p/pyp/ pyp] or [http://code.activestate.com/recipes/437932-pyline-a-grep-like-sed-like-command-line-tool/ Pyline] import commonly used modules and provide more human-readable variables in an attempt to make Python functionality more accessible on the command line. Here is a redo of the above example (printing the last field of a unix long listing):
<syntaxhighlight lang="bash">
ls -l | pyp "whitespace[-1]" # "whitespace" represents each line split on white space in pyp
ls -l | pyline "words[-1]"  # "words" represents each line split on white space in pyline
</syntaxhighlight>

====Executable libraries====
The Python CGIHTTPServer module for example is also an executable library that performs as a web server with CGI. To start the web server enter:
<syntaxhighlight lang="console">$ python -m CGIHTTPServer
Serving HTTP on 0.0.0.0 port 8000 …</syntaxhighlight>