Call a python function from one class in another

I am new to Python and I have difficulties in the basics of functions

a.py

import b
from ConfigParser import SafeConfigParser

class A:
  def method1():
    config = SafeConfigParser()
    b = B()
    b.method2(config)

b.py

class B:
  def method2(config)
    config.
    # The editor does not show the inbuilt methods of config here

I am using IntelliJ IDE