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streaming text processing

Project description

pyin
====

[![Build Status](https://travis-ci.org/geowurster/pyin.svg?branch=master)](https://travis-ci.org/geowurster/pyin) [![Coverage Status](https://coveralls.io/repos/geowurster/pyin/badge.svg?branch=master)](https://coveralls.io/r/geowurster/pyin?branch=master)

Perform Python operations on every line read from `stdin`. Every line is
evaluated individually and available via a variable called `line`.


Installing
----------

Via pip:

$ pip install git+https://github.com/geowurster/pyin.git

From master branch:

$ git clone https://github.com/geowurster/pyin
$ pip install -e .


Examples
--------

Change newline character in a CSV.

$ more sample-data/csv-with-header.csv | pyin "line.replace('\n', '\r\n')" > output.csv


Gotchas
-------

It's easy to completely modify the line content:

$ pyin -i sample-data/csv-with-header.csv "'operation'"
operationoperationoperationoperationoperationoperation

Forgetting to use `-t` to only get lines that evaluate as `True`:

$ pyin -i LICENSE.txt "'are' in line"
FalseFalseFalseFalseFalseFalseTrueFalseFalseFalseFalseFalseFalseFalseFalseFalseTrueFalseFalseFalseFalseFalseFalseFalseFalseFalseFalseFalse

$ pyin -i LICENSE.txt "'are' in line" -t
modification, are permitted provided that the following conditions are met:
derived from this software without specific prior written permission.





Developing
----------

Install:

$ pip install virtualenv
$ git clone https://github.com/geowurster/pyin
$ cd pyin
$ virtualenv venv
$ source venv/bin/activate
$ pip install -r requirements-dev.txt
$ pip install -e .

Test:

$ nosetests

Coverage:

$ nosetests --with-coverage

Lint:

$ pep8 --max-line-length=120 pyin.py

Project details


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pyin-0.2.0.tar.gz (5.0 kB) Copy SHA256 hash SHA256 Source None Feb 3, 2015

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