Skip to main content

Python stream filter

Project description

pit-- Python as a stream filter
=======================================

What's new in version 0.3
~~~~~~~~~~~~~
* Autoimport support with [autoimp](github.com/autoimp). Dependency frozen at 1.0.4 for now.
* Runs on Python 3
* Version flag

What's new in version 0.2
~~~~~~~~~~~~~

* NOTE: expression evaluation is now default; -e now stands for _execute_
* -b flag can be used to execute code before loop
* optional positonal statement after loop

What's new in version 0.1.1
~~~~~~~~~~~~~
* Lines of standard input can be split up by a field separator.
* -e flag evaluates command as an expression.

Pit is a tool for making it easier to run Python on the command line.
It is designed to be a swiss army knife for people who aren't as familiar with
(or who don't want to deal with) the entire array of Unix utilities.

Example uses:
-------------

Quick calculator
~~~~~~~~~~~~~~~
::
pit "math.log(.97**12)"


String processing
~~~~~~~~~~~~~~~
Lines of standard input are piped into the underscore variable, _
::
cat document.txt | pit "_[::-1]" #Reverses all lines

Filter lines
~~~~~~~~~~~~~~
::
cat document.txt | pit -f 'len(_) > 10' # Filter for long lines
cat document.txt | pit -f 'random.random() > 0.5' # Sample lines from document with probability 0.5

Count unique occurences of lines in a document:
~~~~~~~~~~~~~~
The -e flag causes pit to execute the code, rather than evaluate it.
The -b flag (--begin) allows initialization code to be set up.
An optional positional argument after the main code section is run after the input ends.
::
cat redundant.txt | pit -b 'a=set()' 'a.add(_)' 'print(len(a))'

Convert entire document to base64:
~~~~~~~~~~~~~~
The -p flag reads until EOF into the underscore variable.
::
>cat document.txt | pit -p 'base64.encodestring(_)'

Project details


Release history Release notifications

This version
History Node

0.3.0

History Node

0.2.0

Supported by

Elastic Elastic Search Pingdom Pingdom Monitoring Google Google BigQuery Sentry Sentry Error logging CloudAMQP CloudAMQP RabbitMQ AWS AWS Cloud computing Fastly Fastly CDN DigiCert DigiCert EV certificate StatusPage StatusPage Status page