在不同的函数中使用一个变量的不同值

Question

Suppose there is this program

def function():
  print(variable)

def main():
  variable = "Hello"
  function()

def main_2():
  variable="Bye"
  function()

main()
main_2()

there's an error that variable is not defined

I am going to use the function function() a lot, and I want it to use the variable defined in the function main() for only main() and the variable defined in main_2() in only main_2() . How can I do that

Answer 1

You define variable as local variable in main functions. Either you should use it as a global variable or your function() should take input named variable .

Answer 2

Here is correct version of the code:

First of all you need to call global to make the local "scope" global :

Here is the snippet:

def function():
    print(variable)


def main():
    global variable
    variable = "Hello"
    function()


def main_2():
    global variable
    variable = "Bye"
    function()

main()
main_2()

Hope so this information is useful and helpful
Happy Coding

Answer 3

You can pass the variable to your function and use this code

def function(variable):
  print(variable)

def main():
  variable = "Hello"
  function(variable)

def main_2():
  variable="Bye"
  function(variable)

main()
main_2()