Passing Values Between Class And Instance

class MyClassA(object): def __init__(self): entry = input('Insert a value ::: ') b = MyClassB(entry) #To pass the variable entry to class MyClassB c = M

Solution 1:

The problem you're having is because there are two independent instances of MyClassC being created, one in MyClassA.__init__() and a separate one in MyClassB.__init__().

The easy way to fix it — not necessarily the best — would be to make MyClassB.__init__() store the MyClassC instance it creates in yet another instance attribute, and then refer to the attribute of that object when you want to retrieve the value of p.

Here's what I mean:

classMyClassA(object):
    def__init__(self):
        entry = input("Insert a value ::: ")
        b = MyClassB(entry)  # To pass the variable entry to class MyClassB####### c = MyClassC()  # Initializied MyClassC to be ready for receive the value p
        self.x = b.f  # To get back the value f from MyClassBprint(self.x)
        self.x1 = b.c.p  # To get back the value p from MyClassC instance created in MyClassBprint(self.x1)

classMyClassB(object):
    def__init__(self, M):
        self.f = M * 10# f will contain (the value entry from MyClassA *10)
        self.c = MyClassC(self.f)  # Pass variable f to class MyClassC and save instanceclassMyClassC(object):
    def__init__(self, passedVar):
        self.p = passedVar + 0.1# p will contain (the value entry from MyClassB + 0.1)

h = MyClassA()

Solution 2:

In line

c = MyClassC()

it should be

c = MyClassC(b.f)

Solution 3:

Or you could set the value p to the class MyClassC

classMyClassC(object):def__init__(self, passedVar):
        MyClassC.p = passedVar + 0.1

but keep in mind that this situation can happen

classT(object):

    def__init__(self, x):
        T.x = x
if __name__ == '__main__':
    t1 = T(3)
    print t1.x, T.x
    t1.x = 1print t1.x, T.x
    t2 = T(2)
    print t1.x, t2.x, T.x
# output: 3313122