[Adisharma]

Hello Everyone,

Can anyone tell me how to set a global variable inside a function in python? Also, check the below code or anyone knows the better way to learn python in depth. Any recommendation on below code is it right or not.

globvar = 0
def set_globvar_to_one():
global globvar # Needed to modify global copy of globvar
globvar = 1
def print_globvar():
print globvar # No need for global declaration to read value of globvar
set_globvar_to_one()
print_globvar() # Prints 1

 

[Samor]

I don't know but "globvar" is a great name for a villain.

 

[fivefeet8]

In C/C++ there is a variable define "extern". Is there such a variable type in Python?

 

[Samor]

Maybe I'm wrong but don't these new accounts with programming questions and eastern-like names seem a bit weird?

 

[masta.g.86]

Indeed. Guess I'll answer the question though.

Global variables must be defined in main() before the function is called.

If you wish to modify a previously defined global variable within a function, you need to to use the "global" keyword.

x=0

def example()
global x
x += 1
print x

example()

Should display "1" instead of complaining about being undefined.

 

[@ruantec]

I think this is just a spam account and the question sounds fishy. Setting a global variable in a function? that alone sounds quite funny to me as he should know what a global variable is and he just need to set the value when needed.

 

[rohanjoshi0894]

Hi Adi,
When I run your code found this error, please correct them as, in line number three you have not added main.py.
File "main.py", line 3
global globvar # Needed to modify global copy of globvar
^
IndentationError: expected an indented block

If you are looking forward to seeing the best way to learn python then follow this blog post.

 

[masta.g.86]

That's because python REQUIRES you to tab out your functions, loops, and conditional statements.

The reason our example code isn't indented (tabbed) is because pressing the tab key just moves the cursor selection around on the webpage. We should have just typed the example up in Notepad and copy-pasted it, but oh well...

 

[46480]

That's because python REQUIRES you to tab out your functions, loops, and conditional statements.

The reason our example code isn't indented (tabbed) is because pressing the tab key just moves the cursor selection around on the webpage. We should have just typed the example up in Notepad and copy-pasted it, but oh well...

Sorry for the really late reply but there is an insert code reply feature.

const greetings = (name) => {
    return `Hello ${name}`
}

greetings('Silenus') // returns Hello Silenus.

It seems to have Python support too.
Actually is the first time I'm using this.