delegate attributes of a class to another attribute's properties
A python library for delegation (the metaprogramming feature)
This library adds the
@delegate decorator which may be used to delegate
attributes from an attribute of the existing class. For example:
from delegate import delegate class Parent: def __init__(self): self.a = "a" self.b = "b" self.d = "d" # The delegate decorator makes .a and .b available on Child, through its # "parent" attribute, as though Child had an a and b attribute itself. @delegate("a", "b", to="parent") class Child: def __init__(self): self.parent = Parent() self.c = "c" instance = Child() assert instance.a == "a" raised = False try: # But d is not available instance.d except e: raised = True assert raised
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