Presently I'm using Python on a Windows system. I installed Python 3.10 from Anaconda and also the Pycharms IDE. I have ensured that Python is in the correct path in the environment variable. I have also replicated this problem using two different versions of Python, 3.10 and 3.9.
Very simply, in PyCharms, I open a terminal and type
conda install -c numpy numpy.
Then, I write a new "main.py" script. I have one line: "import numpy". I receive the error:
Traceback (most recent call last):
File "C:\Users\---\PycharmProjects\pythonProject3\main.py", line 17, in <module>
import numpy
ModuleNotFoundError: No module named 'numpy'
What am I doing wrong?
Going on advice from a friend, I created a new Pycharm project sitting not in my user director but on the C:\ drive, and got the same error. Finally, when trying to re-install the package using either using either pip or conda, I get the same
# All requested packages already installed.
error message.
CodePudding user response:
Many things can cause this, usually its one of these
- You may have to restart your terminal, or IDE if running in there, after installing a package to "refresh" the environmental path
- The package is not in the environmental path
CodePudding user response:
There main reason for this is
You are running your
main.py
in different environment rather than where you installed numpy.
If you trying to run it via cmd use this method
Check which environment you are in right now. refer this and this. But the most easiest way to do this is use
where
command in windows cmd.C:\> where python
orC:\> where python3
. You will get the path of activated interpreter.list conda envs -
conda env list
activate conda env -
conda activate <env name>
then run this command.
pip freeze
. and check is therenumpy
in the list. If not you have to find and activate the environment where you have installed numpy.
If you want to run it in pycharm
Refer this on how to change pycharm interpreter. https://www.jetbrains.com/help/pycharm/configuring-python-interpreter.html
CodePudding user response:
You have 2 versions of Python:
- Default Python (used everytime you open your command prompt and type
python
orpython3
) - Anaconda is installing packages in a virtual environment, using it's own Python (it is located in a different path)
You can see the path of your installed python using python -c "import os, sys; print(os.path.dirname(sys.executable))"
You have 2 Options:
- Configure the PyCharm in order to use the anaconda Python. https://www.jetbrains.com/help/pycharm/configuring-python-interpreter.html#view_list
- Open a command prompt in the project's folder (you can do it easily using PyCharm). Type
conda env list
. This will show you all available anaconda virtual environments. Choose 1 of them and typeconda activate <env_name>
, where <env_name>=the name of the environment. Then, run your program usingpython <name_of_your_program>
You can see the paths where the anaconda environments and packages are installed using conda info