Can't access an external variable from another file using exec (Python)

Question

I have two files, in the first one where functions are defined named 'functions.py' and the second one where I can call those functions named 'test.py' and I am executing some code with exec from 'test.py' and asking it's asking for the variable initialized in 'for' loop while being 'for' loop through exec but I am getting error

NameError: name 'x' is not defined

Details:

In 'functions.py' I describe a function named 'forloop' like this:

def forloop(current, maximum, increment, code):
    frame = inspect.currentframe().f_back
    for x in range(current, maximum, increment):
        exec(str(code), frame.f_globals, frame.f_locals)

And in 'test.py' I am calling this function

from functions import *

forloop(1,5,1,"""
echo(x)
""")

Now I am executing it with another exec in another file but, I am pretty sure that problem lies in here.

I think I should be able to access 'x' from this exec but, I can't, it gives me an error saying

NameError: name 'x' is not defined

Please tell me why 'x' isn't defined and how can I get 'x' from that file.

Pakium · Accepted Answer · 2019-09-30 19:30:38Z

0

first on test.py you must:

import functions

...then you can call it as

functions.forloop

cheers!

answered Sep 30, 2019 at 19:30

Pakium

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2 Comments

Tecnical Compute Over a year ago

Hey, thanks for answering but, I have 'from functions import *' done this in my test.py but, it still gives the same error and I have edited my question and have added that code in question for no further confusion and please if you can help me, edit your answer.

Pakium Over a year ago

when you use import, you import variales and functions... but not the x of a for loop. you can't use X because it is only in the for loop of forloop, if you want some output declare it in the return of your function forloop. cheers again!

Entroyp · Accepted Answer · 2019-09-30 19:37:07Z

0

Did you try importing the forloop method from your functions.py file into your test.py file?

Your test.py file should look something like this:

from functions import forloop

forloop(1,5,1,"""
echo(x)
""")

edited Sep 30, 2019 at 19:37

answered Sep 30, 2019 at 19:24

Entroyp

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1 Comment

Tecnical Compute Over a year ago

I have actually imported it like this 'from functions import *' but I thought it was obvious but, it wasn't so, I will edit my question, sorry and please do you know what else can be causing this issue

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