AttributeError: partially initialized module 'sympy' has no attribute 'S' (most likely due to a circular import)

Question

This is my code

x,t = sympy.S('x,t')

def dawson(i):
    x = i
    expression = sympy.E**(-x**2) * sympy.integrate(sympy.E**(t**2),t,0,x)
    return sympy.lamdify(expression)

but I get that weird error when I execute it, and this is the first time this is happening. Why is sympy partially initialized and what does a circular import mean here?

Circular import generally means that module A imports module B, and module B also imports module A. If you showed us your imports, perhaps we could be of more help. — John Gordon, Oct 28 '20 at 03:13

score 4 · Accepted Answer · answered Oct 28 '20 at 05:24

Not really sure if this would be of help, but posting this an answer because this error happened to me for me with a different module requests (python -m pip install requests) and this is how I fixed it.

This happened to me because I named the file random.py which also happens to be the name of a module in python's stdlib.

MCVE

import requests
requests.get(None)

Save the file as random.py and run.

AttributeError: partially initialized module 'requests' has no attribute 'get' (most likely due to a circular import)

Renaming the file to a different name solved this problem for me.

So my guess is do not name your file the same as any of python's stdlib module and do not have any .py files that are named the same in your current working directory as well (unlikely if you follow the previous suggestion in the first place).

Thanks I had a file named sympy.py – Szplugz Oct 28 '20 at 19:45 — Szplugz, Oct 28 '20 at 19:45

AttributeError: partially initialized module 'sympy' has no attribute 'S' (most likely due to a circular import)

1 Answers1