A small question about python's variable scope

def hello(x,y):
    good=hi(iy,ix)
    "then do somethings,and use the parameter'good'."
    return something

def hi(iy,ix):
    "code"
    return good

def hello(x,y):
    fordf150 = hi(y,x)
    "then do somethings,and use the variable 'fordf150'."
    return something

def hi( ix, iy ):
    "compute some value, good."
    return good

varA = 5   #A normal declaration of an integer in the main "global" namespace

def funcA():
    print varA #This works, because the variable was defined in the global namespace
               #and functions have read access to this.
def changeA():
    varA = 2  #This however, defines a variable in the function's own namespace
              #Because of this, it's not accessible by other functions.
              #It has also replaced the global variable, though only inside this function
def newVar():
    global varB #By using the global keyword, you assign this variable to the global namespace
    varB = 5

def funcB():
    print varB #Making it accessible to other functions

def hello(x,y):
    good=hi(iy,ix)
    "then do somethings,and use the parameter'good'."
    return something

def hi(iy,ix):
    "code"
    return great