"Most likely due to circular import" in Python

Question

import threading
import time

start = time.perf_counter()

def do_something():
    print("Sleeping in 1 second")
    time.sleep(1)
    print("Done sleeping")

t1 = threading.Thread(target=do_something)
t2 = threading.Thread(target=do_something)

finish = time.perf_counter()
print(f"Finished in {round(finish-start,1)} seconds(s) ")

Does anyone know why this piece of code returns this error when run and how to fix it?

Traceback (most recent call last):
  File "c:/Users/amanm/Desktop/Python/Python Crash Course/threading.py", line 1, in <module>
    import threading
  File "c:UsersamanmDesktopPythonPython Crash Coursethreading.py", line 12, in <module>
    t1 = threading.Thread(target=do_something)
AttributeError: partially initialized module 'threading' has no attribute 'Thread' (most likely due to a circular import)

When I run this code in normal IDLE it seems to work but it doesn’t work in Visual Studio Code.

Asked By: Trqzy

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Source

Answer 1

It seems like the program file you have created is named threading.py, and you are importing a module also called threading. This causes a circular import because your file is shadowing the built-in module.

Please rename your program (e.g., threading_example.py).

Answered By: Lenka Čížková

Answer 2

When importing modules, python checks the files in your current working directory first, before checking other built-in modules. So, you probably have a file named threading.py which doesn’t have the necessary attributes. In other words, you made a circular import.

Answered By: NKUwakwe

Answer 3

I solved my problem, example code:

Main.py

if __name__ == "__main__":
    import package2
    pack2class = package2.Package2(main=self)

package2.py

import Main
class Package2(object):
    def __init__(self, main:Main.MainClass): # for suggestion code
        pass # your codes ...

Answered By: Dream59

"Most likely due to circular import" in Python

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