I'm using Python 3.6 and am trying to follow along with the very first example at the website below (full code also below) and am getting the below error: https://docs.python.org/3.6/library/multiprocessing.html
Error message: AttributeError: module '__main__' has no attribute '__spec__'
Full example code:
from multiprocessing import Pool def f(x): return x*x if __name__ == '__main__': with Pool(5) as p: print(p.map(f, [1, 2, 3]))
I tried Googling it and searching Stack Overflow but I've only found one other case of this error and it did not have an answer.
The problem is not with the code / Python 3.6, it is with Spyder.
After some investigation I found that the code runs fine when executed in an external system terminal but not when run in Spyder's IPython console.
I was able to dump the contents of spec and assign them to a variable that was included inside main to allow this code to function within the IPython console.
from multiprocessing import Pool def f(x): return x*x if __name__ == '__main__': __spec__ = "ModuleSpec(name='builtins', loader=<class '_frozen_importlib.BuiltinImporter'>)" with Pool(5) as p: print (p.map(f, [1, 2, 3]))
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