How do you call a function in a function?

Question

I have a function and I'm making another one in which I need to call the first function. I don't have experience in Python, but I know that in languages like MATLAB it's possible as long as they're in the same directory.

A basic example:

def square(x):
    square = x * x

(and saved)

Now in my new function I want to use the function square I tried:

def something (y, z)
  import square
  something = square(y) + square(z)
  return something

Which displays: builtins.TypeError: 'module' object is not callable.

What should I do?

Answer 1

No need for import if its in the same file.

Just call square from the something function.

def square(x):
  square = x * x
  return square

def something (y, z)
  something = square(y) + square(z)
  return something

More simply:

def square(x):
  return x * x

def something (y, z)
  return square(y) + square(z)

Answer 2

If, and only if, you have the square function defined in a square module, then you should look to import the simple name from it instead.

from square import square

If you don't want to change anything, then you need to use its fully qualified name:

something = square.square(y) + square.square(z)

The module's name is square, and you can't call functions on modules.