What is the current path when python import module?
Original I thought the current path is the path where you run the python code. Such as python ./subfloder/XX.py, then the current path will be the previous path of subfloder.
However, I am wrong. It should be the folder of the XX.py which is the subfolder. Let’s verify by an example.
Two files used in the example
this_is_a_test├── hello_world.py└── say_hello_world.py
hello_world.py
def hello_world():print("hello world!")say_hello_world.py
from hello_world import hello_worldhello_world()
First simple run (success)
Under the folder of this_is_a_test, run. Correct.
this_is_a_test % python say_hello_world.pyhello world!
Second run (success)
What about the following command when run the code at the previous folder of “this_is_a_test” folder?
% python this_is_a_test/say_hello_world.pyhello world!
It works, then it means, when importing, the python is looking for the package in the current folder of the to be executed folder, which is this_is_a_test ,instead of the “CURRENT FOLDER”, which is the previous path of this_is_a_test.
Third run (fail)
In order to verify, we move the hello_world.py code to the previous path of this_is_a_test folder and run
this_is_a_test % python say_hello_world.pyhello world!
Got the following error:
% python this_is_a_test/say_hello_world.pyTraceback (most recent call last):File "this_is_a_test/say_hello_world.py", line 1, in <module>from hello_world import hello_worldModuleNotFoundError: No module named 'hello_world'
By those 3 tests, we can see that the python is looking for the subfloder when you run the code. The subfolder is this_is_a_test.
python this_is_a_test/say_hello_world.py
