Call method from string

If I have a Python class, and would like to call a function from it depending on a variable, how would I do so? I imagined following could do it:

class CallMe: # Class

   def App(): # Method one

      ...

   def Foo(): # Method two

      ...

variable = "App" # Method to call

CallMe.variable() # Calling App()

But it couldn't. Any other way to do this?