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Predicate Functions for Python in the style of django filters

Project description

Predicate

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Predicate takes the django queryset filtering language and applies it to building python native predicate functions that you can pass to the filter builtin.

This library is mean to make creating native python filter functions readable and easy:

>>> from predicate import where

>>> people = [
...     {'name': {'first': 'Joe', 'last': 'Smith'}, 'age': 25},
...     {'name': {'first': 'Jane', 'last': 'Smith'}, 'age': 27},
...     {'name': {'first': 'John', 'last': 'Smith'}, 'age': 33},
...     {'name': {'first': 'Bill', 'last': 'Bob'}, 'age': 40},
...     {'name': {'first': 'Joe', 'last': 'Bob'}, 'age': 59},
... ]


>>> young_smiths = list(filter(where(name__last__iexact='smith', age__lte=30), people))

>>> young_smiths
[{'name': {'first': 'Joe', 'last': 'Smith'}, 'age': 25}, {'name': {'first': 'Jane', 'last': 'Smith'}, 'age': 27}]

Installation

This project is distributed via pip. To get started:

pip install predicate

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