Python local and global variable [duplicate]

Question

def f():
    global s
    print s
    s = "That's clear."
    print s     

s = "Python is great!" 
f()
print s

Output:

Python is great!
That's clear.
That's clear.

as per program, the last print statement should return "s= Python is great" because I think here S should be referred Global variable.

It is, but you gave it a new value in f(). Globals can be accessed and modified in any scope. If you want the last print to output "Python is great", then you should not declare s a global. — steliosbl
– steliosbl, Commented Jul 13, 2017 at 10:26
No, you just updated it in your function. It would still be "Python is great!" if you hadn't declared it as global in f. — Thierry Lathuille
– Thierry Lathuille, Commented Jul 13, 2017 at 10:26
You have changed the value of global variable 's' in the function 'f()' — Albin Antony
– Albin Antony, Commented Jul 13, 2017 at 10:36

Nimish Bansal · Accepted Answer · 2017-07-13 10:28:28Z

2

You modified the global variable in your function (f) so the variable now has the value that you modified at last i.e. "That's clear."

answered Jul 13, 2017 at 10:28

Nimish Bansal

1,7594 gold badges24 silver badges42 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

flevinkelming · Accepted Answer · 2017-07-13 10:42:53Z

0

The output is correct. After s is defined as a global variable, you print the value assigned to s at that point which is Python is great, then you assign That's clear. to s - s is now global, so when you assign That's clear. to it inside your function, that becomes it's value in the outer scope as well.

Here is a good stackoverflow answer regarding Scoping Rules.

answered Jul 13, 2017 at 10:42

flevinkelming

6907 silver badges8 bronze badges

Collectives™ on Stack Overflow

Python local and global variable [duplicate]

2 Answers 2

Comments

Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Linked

Related