Borislav Hadzhiev
Wed Apr 20 2022ยท4 min read
Photo by Raychan
The Python "ModuleNotFoundError: No module named 'numpy'" occurs when we
forget to install the numpy
module before importing it or install it in an
incorrect environment. To solve the error, install the module by running the
pip install numpy
command.
Open your terminal in your project's root directory and install the numpy
module.
# ๐๏ธ in a virtual environment or using Python 2 pip install numpy # ๐๏ธ for python 3 (could also be pip3.10 depending on your version) pip3 install numpy # ๐๏ธ if you get permissions error sudo pip3 install numpy # ๐๏ธ if you don't have pip in your PATH environment variable python -m pip install numpy # ๐๏ธ for python 3 (could also be pip3.10 depending on your version) python3 -m pip install numpy # ๐๏ธ for Anaconda conda install -c anaconda numpy
After you install the numpy package, try importing it like:
import numpy as np a = np.arange(6) a2 = a[np.newaxis, :] print(a2.shape)
The Python error "ModuleNotFoundError: No module named 'numpy'" occurs for multiple reasons:
numpy
package installed by running pip install numpy
.numpy.py
which would shadow the official module.numpy
which would shadow the imported variable.If the error persists, get your Python version and make sure you are installing the package using the correct Python version.
python --version
For example, my Python version is 3.10.4
, so I would install the numpy package
with pip3.10 install numpy
.
pip3.10 install numpy # ๐๏ธ if you get permissions error use pip3 (NOT pip3.X) sudo pip3 install numpy
Notice that the version number corresponds to the version of pip
I'm using.
If the PATH for pip
is not set up on your machine, replace pip
with
python3 -m pip
:
# ๐๏ธ make sure to use your version of Python, e.g. 3.10 python3 -m pip install numpy
If the "No module named 'numpy'" error persists, try restarting your IDE and development server / script.
You can check if you have the numpy
package installed by running the
pip show numpy
command.
# ๐๏ธ check if you have numpy installed pip3 show numpy # ๐๏ธ if you don't have pip setup in PATH python3 -m pip show numpy
The pip show numpy
command will either state that the package is not installed
or show a bunch of information about the package, including the location where
the package is installed.
If the package is not installed, make sure your IDE is using the correct version of Python.
numpy
package using the incorrect version or your IDE might be setup to use a different version.For example, In VSCode, you can press CTRL + Shift + P
or (โ
+ Shift
+ P
on Mac) to open the command palette.
Then type "Python select interpreter" in the field.
Then select the correct python version from the drop down menu.
If you are using a virtual environment, make sure you are installing numpy
in
your virtual environment and not globally.
You can try creating a virtual environment if you don't already have one.
# ๐๏ธ use correct version of Python when creating VENV python3 -m venv venv # ๐๏ธ activate on Unix or MacOS source venv/bin/activate # ๐๏ธ activate on Windows (cmd.exe) venv\Scripts\activate.bat # ๐๏ธ activate on Windows (PowerShell) venv\Scripts\Activate.ps1 # ๐๏ธ install numpy in virtual environment pip install numpy
Your virtual environment will use the version of Python that was used to create it.
numpy.py
because that would shadow the original numpy
module.You also shouldn't be declaring a variable named numpy
as that would also
shadow the original module.
If the error is not resolved, try to uninstall the numpy
package and then
install it.
# ๐๏ธ check if you have numpy installed pip3 show numpy # ๐๏ธ if you don't have pip setup in PATH python3 -m pip show numpy # ๐๏ธ uninstall numpy pip3 uninstall numpy # ๐๏ธ if you don't have pip setup in PATH python3 -m pip uninstall numpy # ๐๏ธ install numpy pip3 install numpy # ๐๏ธ if you don't have pip setup in PATH python3 -m pip install numpy
Try restarting your IDE and development server / script.
You can also try to upgrade the version of the numpy package.
pip3 install numpy --upgrade # ๐๏ธ if you don't have pip setup in PATH python3 -m pip install numpy --upgrade
This one is for using using virtual environments (VENV) on Windows
:
This one is for using using virtual environments (VENV) on MacOS
and Linux
: