How can I share a variable between functions in Python?

Question

I have two functions, fun1 and fun2, which take as inputs a string and a number, respectively. They also both get the same variable, a, as

Answer 1

Since a is defined outside the function scope and before the functions are defined, you do not need to feed it as an argument. You can simply use a.

Python will first look whether the variable is defined in the function scope, and if not, it looks outside that scope.

a = ['A','X','R','N','L']

def fun1(string):
    out = []
    for letter in a:
        out.append(string+letter)
    return out

def fun2(number):
    out = []
    for letter in a:
        out.append(str(number)+letter)
    return out

x = fun1('Hello ')
y = fun2(2)

In this case you can also rewrite your functions into more elegant list comprehensions:

a = ['A','X','R','N','L']

def fun1(string):
    return [string+letter for letter in a]

def fun2(number):
    return [str(number)+letter for letter in a]

x = fun1('Hello ')
y = fun2(2)