SyntaxError when assigning to global var

Question

I am trying out Python for a new project, and in that state, need some global variable. To test without changing the hardcoded value, I\'ve tried to make a function that reassig

Answer 1

Python doesn't require you to explicitly declare variables and automatically assumes that a variable that you assign has function scope unless you tell it otherwise. The global keyword is the means that is provided to tell it otherwise. And you can't assign value when you declare it as global. Correct way will be

foo = None

def setFoo(bar):
    global foo 
    foo = bar

setFoo(1)

Answer 2

As saurabh baid pointed out, the correct syntax is

foo = None

def set_foo(bar):
    global foo 
    foo = bar

set_foo(1)

Using the global keyword allows the function to access the global scope (i.e. the scope of the module)

Also notice how I renamed the variables to be snake_case and removed the semi-colons. semi-colons are unnecessary in Python, and functions are typically snake_case :)

Answer 3

foo = None;

def setFoo(bar):
    global foo 
    foo = bar

setFoo(1);

Answer 4

global and assignment are both statements. You can't mix them on the same line.

Answer 5

global and foo = bar on separate lines

foo = None

def setFoo(bar):
    global foo
    foo = bar

setFoo(1)

don't use semicolon: Python: What Does a Semi Colon Do?