using functions with variables from other python files at notebook's directory

Question

For example, in my folder, I have my ipython notebook "program.ipynb" and a python file "functions.py" which has some functions in it, for example, "func"

from numpy import sqrt
def func(x):
    return N + sqrt(x)

that is going to be used in "program.ipynb" which looks like that

from functions import func
N = 5
func(2)
--> name 'N' is not defined

To fix the bug i need to define the variable N in my functions.py file but isn't there a way around? I want to define all my global variables in my main programm (program.ipynb).

Did you try global N then N=5. In general global variables are a bad practice as it gets harder to debug. — Rithin Chalumuri
– Rithin Chalumuri, Commented Oct 31, 2019 at 11:54
I tried _ global N _ , _ N=5 _ , _ func(2) _ and still got the same error — Heißenberg93
– Heißenberg93, Commented Oct 31, 2019 at 12:00
BTW: all variables created outside functions are global. We use word global inside function (not outside) to inform function that we want to use external/global variable. — furas
– furas, Commented Oct 31, 2019 at 12:20

U13-Forward · Accepted Answer · 2019-10-31 11:52:01Z

2

You can't access a variable like that, the best way would be:

functions.py

from numpy import sqrt
def func(x, N):
    return N + sqrt(x)

program.ipynb

from functions import func
N = 5
func(2, N)

answered Oct 31, 2019 at 11:52

U13-Forward

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