function in function python

                                    def test_function(argument1,argument2,argument3) :
  # Do something with the code, and the arguments.
  print(argument1)
  print(argument2)
  print(argument3)
  
# Calling the function.

test_function('Hello','World','!')

# Output
'''
Hello
World
!
'''

                                    def function1(): # outer function
    print ("Hello from outer function")
    def function2(): # inner function
        print ("Hello from inner function")
    function2()

function1()

                                    #Letters, Nums,
#& underscores
#only, can't	=7  
#start w/ num	|		  _ 5 is the default value if no
# 	  |			|		 |  value is passed
#	  v         v        v
def funcName(param1, param2=5): #The colon terminates func header 
	str(param1) #Typecasting is temparary
    strVar = str(param1) # To make typecast perma, assign to var
    param1 = param2 # 5 is passed to param1 
    return param1 # 5 is returned
#	  ^      ^
#     |		 |_ return value is optional, if no return value, func 
  #Optional		will end returning to func call
  #return

x = funcName(7)
print(x) # prints 5

                                    def myFunction(say): #you can add variables to the function
  print(say)

myFunction("Hello")

age = input("How old are you?")

myFunction("You are {} years old!".format(age))

#this is what you get:

Hello
How old are you?
>>11 #lol my real age actually
You are 11 years old!

                                    def example():			#This defines it
  print("Example.")		#This is the defined commands

example()				#And this is the commands being run