CODEWITHSUNDEEP
pythonclasspython-2.7oopmethods
yggdra
yggdra

Reputation: 31

python class instance method call from another class instance

I have a quick question regarding python classes. The following is the setup: I have one class as the "mastermind" class which contains various instances of other classes. Now these classes need to call a method of that other class, but I don't know how to do that. For example:

class mastermind(object):

    def __init__(self):
        self.hand = hand()

    def iNeedToCallThisMethod(self, funzies):
        print funzies

class hand(object):

    def __init(self):
        pass #here should be a call to the mastermind instance's method

example = mastermind()

Hope you guys can help me with that, my brain is steaming! Thanks a lot!

Upvotes: 2

Views: 20138

Answers (4)

JGerulskis
JGerulskis

Reputation: 808

class hand(object):

    def __init(self, other_class):
        #here should be a call to the mastermind instance's method
        other_class.iNeedToCallThisMethod()
m_m = mastermind()
example = hand(m_m) # passes mastermind to new instance of hand

I'd just pass the object like above

Upvotes: -1

Malik Brahimi
Malik Brahimi

Reputation: 16711

Both object need a reference to one another, try passing the instance to the constructor.

class Mastermind(object):

    def __init__(self):
        self.hand = Hand(self)

    def test_funct(self, arg):
        print arg


class Hand(object):

    def __init(self, mastermind):
        self.mastermind = mastermind
        self.mastermind.test_funct()

Upvotes: -1

Saksham Varma
Saksham Varma

Reputation: 2130

If you need to call iNeedToCallThisMethod from the __init__ of hand, you should probably put the method in that class.

However, what you want to do can be achieved using a classmethod:

class mastermind(object):
   def __init__(self):
        self.hand = hand()

   @classmethod
   def iNeedToCallThisMethod(cls, funzies):
        print funzies

class hand(object):
   def __init__(self):
        mastermind.iNeedToCallThisMethod('funzies')

example = mastermind()

Upvotes: 1

Peter Uhnak
Peter Uhnak

Reputation: 10197

If you want to call mastermind's method, you need to have a reference to it.

For example

class mastermind(object):
    def __init__(self):
        self.hand = hand(self)

    def iNeedToCallThisMethod(self, funzies):
        print funzies

class hand(object):
    def __init__(self, mastermind)
        mastermind.iNeedToCallThisMethod('funzies')

Upvotes: 9

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