I have written a module (a file
my_mod.py file residing in the folder
Currently, I am working in the file
cool_script.py that resides in the folder
cur_proj. I have opened the folder in PyCharm using File — open (and I assume, hence, it is a PyCharm project).
In ProjectView (CMD-7), I can see my project
cur_proj (in red) and under "External Libraries" I do see
my_module. In cool_script.py, I can write
from my_module import my_mod as mm
and PyCharm even makes suggestion for my_mod. So far so good.
However, when I try to run cool_script.py, PyCharm tells me
"No module named my_module"
This seems strange to me, because
A) in the terminal (OS 10.10.2), in python, I can import the module no problem — there is a corresponding entry in the PYTHONPATH in .bashrc
B) in PyCharm — Settings — Project cur_proj — Project Interpreter — CogWheel next to python interpreter — more — show paths for selected interpreter icon, the paths from PYTHONPATH do appear (as I think they should)
Hence, why do I get the error when I try to run cool_script.py? — What am I missing?
- I am not declaring a different / special python version at the top of cool_script.py
- I made sure that the path to
- I put
__init__.pyfiles (empty files) both in
- I am not using
When I go in PyCharm to Run — Edit Configurations, for my current project, there are two options that are selected with a check mark: "Add content roots to PYTHONPATH" and "Add source roots to PYTHONPATH". When I have both unchecked, I can load my module.
So it works now — but why?
Further questions emerged:
- What are "content roots" and what are "source roots"? And why does adding something to the PYTHONPATH make it somehow break?
- should I uncheck both of those options all the time (so also in the defaults, not only the project specific configurations (left panel of the Run/Debug Configurations dialog)?