30 lines
799 B
ReStructuredText
30 lines
799 B
ReStructuredText
.. _bind-method:
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Binding a method to a class
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---------------------------
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Python 2 draws a distinction between bound and unbound methods, whereas
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in Python 3 this distinction is gone: unbound methods have been removed
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from the language. To bind a method to a class compatibly across Python
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3 and Python 2, you can use the :func:`bind_method` helper function::
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from future.utils import bind_method
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class Greeter(object):
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pass
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def greet(self, message):
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print(message)
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bind_method(Greeter, 'greet', greet)
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g = Greeter()
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g.greet('Hi!')
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On Python 3, calling ``bind_method(cls, name, func)`` is equivalent to
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calling ``setattr(cls, name, func)``. On Python 2 it is equivalent to::
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import types
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setattr(cls, name, types.MethodType(func, None, cls))
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