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A Python module for extracting values out of a string using a simple pattern instead of a regular expression.

Project Description

Extract Values

A Python module for extracting values out of a string using a simple pattern instead of a regular expression by defining groups of named characters using a pair of opening and closing delimiters.


from extract_values import extract_values

>>> extract_values('/2012/08/12/test.html', '/{year}/{month}/{day}/{title}.html')
{ 'year': '2012', 'month': '08', 'day': '12', 'title': 'test' }

>>> extract_values('John Doe <> (', '{name} <{email}> ({url})')
{'name': 'John Doe', 'email': '', 'url': '' }

>>> extract_values('from 4th October to 10th October', 'from `from` to `to`', strip_values=True, whitespace=1, delimiters=['`', '`'])
{'from': '4th October', 'to': '10th October' }

>>> extract_values('Convert 1500 Grams to Kilograms', 'convert {quantity} {from_unit} to {to_unit}', lowercase=True)
{'quantity': '1500', 'from_unit': 'grams', 'to_unit': 'kilograms' }]

>>> extract_values('The time is 4:35pm here at Lima, Peru', 'The time is :time here at :city', delimiters=[':', ''])
{'time': '4:35pm', 'city': 'Lima, Peru'}

Optional parameters:

* **lowercase** - When True is passed the string is lowercased first
* **whitespace** - Minimal number of extra whitespace to remove
* **strip_values** - When True calls strip() for each value removing whitespace
* **delimiters** - A sequence with only the opening and closing delimiters

In order to install this package from [PyPi]( you can run any of these commands:

easy_install extract-values


pip install extract-values

This library can also be installed directly from Github with the following command:

pip install git+ssh://

This little project was inspired by a similar [Node.js]( module created by sri-lankan developer [Lakshan Perera]( available [here](

(c) 2012 - Antonio Ognio <> - Distributed under the BSD license - Made in Peru.

Release History

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