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Python polymorphic function declaration with obvious syntax

Project Description

Build Status Coverage Status PyPI version PyPI license

Python polymorphic function declaration with obvious syntax. Just use the same function name and mark each function definition with @polymorphic decorator.

Installation

pip install polypie

Requirements

Example

from typing import Any, Sequence

from polypie import polymorphic, PolypieException


@polymorphic
def example(a: int, b):
    print('(1)')


@polymorphic
def example(a: str, b: Any):
    print('(2)')


@polymorphic
def example(a: Sequence[str]):
    print('(3)')


example(100, 200)   # (1)
example('foo', 200)   # (2)
example(['foo'])   # (3)
example(('bar', 'baz'))   # (3)
try:
    example({'foo': 'bar'})
except PolypieException as exc:
    print(exc)   # Matching signature <...> not found


class Example:

    def __init__(self):
        self.values = {}

    @polymorphic
    def value(self, name):
        return self.values[name]

    @polymorphic
    def value(self, name, value):
        self.values[name] = value


instance = Example()
instance.value('foo', 100)
instance.value('bar', 'baz')
print(instance.value('foo'))   # 100
print(instance.value('bar'))   # baz

Tests

  1. Install dependencies: pip install -r requirements_dev.txt
  2. nosetests --with-coverage or tox

Release history Release notifications

This version
History Node

0.1.3

History Node

0.1.2

History Node

0.1.1

History Node

0.1.0

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Filename, size & hash SHA256 hash help File type Python version Upload date
polypie-0.1.3.tar.gz (3.9 kB) Copy SHA256 hash SHA256 Source None Jun 16, 2016

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