Source code for pytraits.trait_composer

#!/usr/bin/python -tt
# -*- coding: utf-8 -*-
   Copyright 2014-2015 Teppo Perä

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   See the License for the specific language governing permissions and
   limitations under the License.

from pytraits.core import TraitFactory
from import type_converted

TraitTarget = TraitFactory["TraitTargetInspector"]
Traits = TraitFactory["Traits"]

[docs]def add_traits(target: TraitTarget, *traits, **resolutions): """ Bind new traits to given object. Args: target: Object of any type that is going to be extended with traits traits: Tuple of traits as object and strings or callables or functions. resolutions: dictionary of conflict resolutions to solve situations where multiple methods or properties of same name are encountered in traits. >>> class ExampleClass: ... def example_method(self): ... return None ... >>> class ExampleTrait: ... def other_method(self): ... return 42 ... >>> add_traits(ExampleClass, ExampleTrait) >>> ExampleClass().other_method() 42 """ # Return immediately, if no traits provided. if not len(traits): return # Just prepare object to start the work and get done with it. traits = Traits(traits) # This call puts all gears moving. Each trait in turn is being added # to target object. Resolutions are used to solve any conflicts along # the way. traits.compose(target, resolutions)
if __name__ == '__main__': import doctest doctest.testmod()