Python passing variables through functions

Question

I have been learning python for 2 days. So I am making this program which generates different numbers, and adds them to a string. I have a function for getting the random numbers:

def GetRandomNumbers():
    random_number = random.choice(zero_to_nine)
    two_random_number = random.choice(zero_to_nine)
    three_random_number = random.choice(zero_to_nine)
    four_random_number = random.choice(zero_to_nine)

//

def SettingVariables():
    first_combination = ("__asm _emit " + zero + ("x") + random_number + " " + "/")
    two_first_combination = ("__asm _emit " + zero + ("x") + two_random_number + " " + "/")
    three_first_combination = ("__asm _emit " + zero + ("x") + three_random_number + " " + "/")
    four_first_combination = ("__asm _emit " + zero + ("x") + four_random_number + " " + "/")

And then when I attempt to use theese generated variables in a different function where theese numbers are added onto text it is unidentified. I know it has something to do with global variables, but I would need some explaining.

Answer 1

Propably you should return values from your first function:

def GetRandomNumbers():
    ... # get your numbers
    return random_number, two_random_number, ...

Then you can parse these numbers as an argument to your second function:

def SettingVariables(first_num, second_num, third_num): ...

You could set a global variable like this (this is not recommended):

global var
var = 1

Your code could look like this:

def GetRandomNumbers():
    random_number = random.choice(zero_to_nine)
    two_random_number = random.choice(zero_to_nine)
    three_random_number = random.choice(zero_to_nine)
    four_random_number = random.choice(zero_to_nine)
    return random_number, two_random_number, three_random_number, four_random_number 

def SettingVariables(random_number, two_random_number, three_random_number, four_random_number):
    first_combination = ("__asm _emit " + zero + ("x") + random_number + " " + "/")
    two_first_combination = ("__asm _emit " + zero + ("x") + two_random_number + " " + "/")
    three_first_combination = ("__asm _emit " + zero + ("x") + three_random_number + " " + "/")
    four_first_combination = ("__asm _emit " + zero + ("x") + four_random_number + " " + "/")

# later in the program
nums = GetRandomNumbers()
SettingVariables(nums[0], nums[1], nums[2], nums[3]) # could also use *nums

Note that your SettingVariables function should also return the "combinations". You then can use the same principle

Answer 2

It's interesting that you're function names contains keyword get and set . These are concept familiar to classes. You may consider define some classes here. An example would be

class RandomNumbers:
        def __init__(self, zero_to_nine):
            random_number = random.choice(zero_to_nine)


class Variables:
    def __init__(self, random_numbers):
        self.first_combination = ("__asm _emit " + zero + ("x") + random_numbers.random_number + " " + "/")
        ...

Then you can do like this:

random_numbers = RandomNumbers()
variables = Variables(random_numbers)
print(variables.first_combination)

[edit]

I suggested classes as it seems that you'are using functions as initializers. They are quite similar to what in OOP are object constructors.
This would avoid the need for declaring all a bunch of variables outside of the function, update them an returning from the function.