ModuleNotFoundError: No module named 'numpy' in Python

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.

shell

`# 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:

main.py

`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:**

- Not having the
`numpy`

package installed by running`pip install numpy`

. - Installing the package in a different Python version than the one you're using.
- Installing the package globally and not in your virtual environment.
- Your IDE running an incorrect version of Python.
- Naming your module
`numpy.py`

which would shadow the official module. - Declaring a variable named
`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.

shell

`python --version`

For example, my Python version is `3.10.4`

, so I would install the numpy package
with `pip3.10 install numpy`

.

shell

`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`

:

shell

`# 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.

shell

`# 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.

If you have multiple Python versions installed on your machine, you might have installed the

`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.

Your IDE should be using the same version of Python (including the virtual environment) that you are using to install packages from your terminal.

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.

shell

`# 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.

If the error persists, make sure you haven't named a module in your project as

`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.

shell

`# 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.

shell

`pip3 install numpy --upgrade # ๐๏ธ if you don't have pip setup in PATH python3 -m pip install numpy --upgrade`

If the error persists, I would suggest watching a quick video on how to use Virtual environments in Python.

This one is for using using virtual environments (VENV) on `Windows`

:

This one is for using using virtual environments (VENV) on `MacOS`

and `Linux`

:

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