1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29
|
.. _bind-method:
Binding a method to a class
---------------------------
Python 2 draws a distinction between bound and unbound methods, whereas
in Python 3 this distinction is gone: unbound methods have been removed
from the language. To bind a method to a class compatibly across Python
3 and Python 2, you can use the :func:`bind_method` helper function::
from future.utils import bind_method
class Greeter(object):
pass
def greet(self, message):
print(message)
bind_method(Greeter, 'greet', greet)
g = Greeter()
g.greet('Hi!')
On Python 3, calling ``bind_method(cls, name, func)`` is equivalent to
calling ``setattr(cls, name, func)``. On Python 2 it is equivalent to::
import types
setattr(cls, name, types.MethodType(func, None, cls))
|