Why is from code import * different from entering that code directly into the REPL?

[sebi]

...indeed, for code.py being

a = 0
def func():
    global a
    a = 1

after entering that code directly into the REPL and typing

func()
print(a)

I get 1, while I get 0 after a

from code import *

Why? Dear community, I am a noob looking forward to understanding such different behaviors. Any help would be greatly appreciated.

[Gribouillis]

When you import the module, the function is defined but it is not called. The module doesn't contain the line

func()

[sebi]

Indeed.
...but I do call the function from within the REPL (not the module) as I enter:

from code import *
func()
print(a)

I would expect to get 1 (rather than 0) as when entering the content from code.py directly into the REPL. I am still puzzled...

[Gribouillis]

It is because each module has its own global namespace, so the global a in module code is not the global a in module __main__. You can use

from code import *
import code
func()
print(code.a)

It is usually best to avoid functions that update global variables.

[buran]

And also star import is considered bad practice altogether, so better avoid it

[sebi]

Thank you all