Override Python's 'in' operator? Override Python's 'in' operator? python python

Override Python's 'in' operator?


A more complete answer is:

class MyClass(object):    def __init__(self):        self.numbers = [1,2,3,4,54]    def __contains__(self, key):        return key in self.numbers

Here you would get True when asking if 54 was in m:

>>> m = MyClass()>>> 54 in mTrue  

See documentation on overloading __contains__.


You might also want to take a look at an infix operator override framework I was able to use to create a domain-specific language:

http://code.activestate.com/recipes/384122/