function calling function example

function_that_calls_function.py

def print_function():
   """ I'm also a function, but I don't take any parameters"""
   print "I'm {}, and I'm printing now".format(print_function.__name__)

def subtractor(a, b): 
   """I subtract b from a and return the result"""  
   print "I'm a function. My name is {}".format(subtractor.__name__)
   print "I'm about to subtract {} and {}".format(a,b)
   return a - b  # i output a value by using the return statement
   
def function3(a=1, b=1): 
   """ I'm a function that calls other functions """
   print "I'm {} and I'm about to call subtractor function".format(function3.__name__)
   total = subtractor(a,b)
   print "I'm {} and I'm about to call print_function".format(function3.__name__)
   print_function()
   print "I'm {} and I'm about return total".format(function3.__name__)
   return total

if __name__ == '__main__':
	total = function3()
	print "total is {}".format(total)