Passing Variables Simplified

Question

I am working on a project, but I need to pass variables between functions and I do not know how. I am not very good at python at all. I just started learning it like a month ago. Anyhow I just want to know the simplest way to pass a variable between functions.

Can I just do this?

def a():
    variable1 = 0
    answer = raw_input()
    if answer == "a":
       print "Correct"
       b()

def b():
    #Variable1 should now be here also right?
    a()

Answer 1

Add a parameter to your function b.

def b(argument1):
   print 'This is function b(), argument1=', argument1

def a():
    # call func b, passing it 42 as an argument
    b(42)

• Python Functions

---

In Python you can use global variables, but this is not the recommended way of doing things. Global variables should generally be avoided.

def b()
    print 'This is function b(), globalVar1=', globalVar1

def a()
    global globalVar1

    globalVar1 = 88

    b()

• Using global variables in a function other than the one that created them

Answer 2

The easiest way to pass a variable between functions is to define the necessary function to accept an argument. Check out functions -part in the official tutorial

In your case you want to pass variable1 to b . Define b as such:

def b(var):
     print var
     # Whatever else you want to do..

def a():
    variable1 = 0
    answer = raw_input()
    if answer == "a":
       print "Correct"
       b(variable1)

Your original code does not work because variables inside functions are local to those functions. Using function arguments is the correct way of doing what you want.