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NameError: name '...' is not defined

asked 2022-08-19 12:10:33 +0100

Alex Karenin gravatar image

I got the preparsed with sage --preparse command keflll.py file with the function invertibles() that returns the list of integers. It doesn't use any lambda expressions. I can call it in the code, but as long as I try to call it in parallel i get the error:

NameError: name 'invertibles' is not defined

The code is given below:

from keflll import invertibles
from sage.parallel.multiprocessing_sage import pyprocessing

p_iter = pyprocessing(4)
P = parallel(p_iter=p_iter)
def f(x):    
    return invertibles(x)

list( P(f)([(2,),(3,)]) )

How can I parallelize calls of the functions that are in custom made module or just depend on those?

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Try to move from keflll import invertibles inside the definition of f.

Max Alekseyev gravatar imageMax Alekseyev ( 2022-08-19 13:24:55 +0100 )edit

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answered 2022-08-19 14:51:37 +0100

slelievre gravatar image

updated 2023-12-05 15:45:48 +0100

Not sure if that would help, but the relevant import could be made part of the function that is being called in parallel.

Something like the following:

from sage.parallel.multiprocessing_sage import pyprocessing

p_iter = pyprocessing(4)
P = parallel(p_iter=p_iter)

def f(x):
    from keflll import invertibles
    return invertibles(x)

list(P(f)([(2,), (3,)]))
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Asked: 2022-08-19 12:10:33 +0100

Seen: 1,320 times

Last updated: Dec 05 '23