How to use functions between classes in python

Question

If I have more than one class in a python script, how do I call a function from the first class in the second class?

Here is an Example:

Class class1():

  def function1():
        blah blah blah

Class class2():

 *How do I call function1 to here from class1*

If you really need the functionality int class2 from class1 it would make more sense to put it into class2 instead, but I realize that this isn't part of your question but rather more some information. — sean
– sean, Commented Jul 18, 2012 at 3:41
Ah, in that case in my opinion it would make more sense to not put the function in either class but have it on its own. — sean
– sean, Commented Jul 18, 2012 at 3:46
Questions like this reflect a fundamental misunderstanding. Classes are not simply containers for functions; they're blueprints for objects. — Karl Knechtel
– Karl Knechtel, Commented Jul 18, 2012 at 7:38

Ned Batchelder · Accepted Answer · 2012-07-18 03:40:28Z

1

Functions in classes are also known as methods, and they are invoked on objects. The way to call a method in class1 from class2 is to have an instance of class1:

class Class2(object):
    def __init__(self):
        self.c1 = Class1()
        self.c1.function1()

answered Jul 18, 2012 at 3:40

Ned Batchelder

378k77 gold badges583 silver badges675 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

mVChr · Accepted Answer · 2012-07-18 03:53:50Z

0

The cleanest way is probably through inheritance:

class Base(object):
    def function1(self):
        # blah blah blah

class Class1(Base):
    def a_method(self):
        self.function1()  # works

class Class2(Base):
    def some_method(self):
        self.function1()  # works

c1 = Class1()
c1.function1()  # works
c2 = Class2()
c2.function1()  # works

answered Jul 18, 2012 at 3:53

mVChr

50.3k11 gold badges111 silver badges105 bronze badges

1 Comment

thekaveman Over a year ago

i think you mean c2.function1()

Collectives™ on Stack Overflow

How to use functions between classes in python

2 Answers 2

Comments

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related