ModuleNotFoundError: No module named 'scipy' in Python

Borislav Hadzhiev

Last updated: Jan 30, 2023

Reading timeยท11 min

**The Python "ModuleNotFoundError: No module named 'scipy'" occurs when we
forget to install the scipy module before importing it or install it in an
incorrect environment.**

**To solve the error, install the module by running the pip install scipy
command.**

Open your terminal in your project's root directory and install the `scipy`

module.

shell

`# ๐๏ธ in a virtual environment or using Python 2 pip install scipy # ๐๏ธ for python 3 (could also be pip3.10 depending on your version) pip3 install scipy # ๐๏ธ if you get permissions error sudo pip3 install scipy pip install scipy --user # ๐๏ธ if you don't have pip in your PATH environment variable python -m pip install scipy # ๐๏ธ for python 3 (could also be pip3.10 depending on your version) python3 -m pip install scipy # ๐๏ธ using py alias (Windows) py -m pip install scipy # ๐๏ธ alternative for Debian (Ubuntu) sudo apt-get install python3-scipy # ๐๏ธ Alternative for Fedora sudo dnf install python3-scipy # ๐๏ธ Alternative for macOS brew install scipy # ๐๏ธ for Anaconda conda install -c anaconda scipy # ๐๏ธ for Jupyter Notebook !pip install scipy`

After you install the scipy package, try importing it as follows.

main.py

`from scipy import stats from scipy.stats import norm print(dir(stats)) print('bounds of distribution lower: %s, upper: %s' % norm.support())`

If you forget to import the `scipy`

module before using it, you'd get the
**"NameError: name 'scipy' is not defined"** error.

Alternatively, you can import the sub-modules from `scipy`

to not have to prefix
every interaction with `scipy.`

.

main.py

`from scipy import integrate, special, stats result = integrate.quad(lambda x: special.jv(2.5, x), 0, 4.5) print(result) print(stats.norm.cdf(0))`

Instead of accessing each sub-module as `scipy.sub_module`

, we now access the
sub-modules directly.

You can also import only the functions you intend to use from each module.

main.py

`from scipy.integrate import quad from scipy.special import jv from scipy.stats import norm result = quad(lambda x: jv(2.5, x), 0, 4.5) print(result) print(norm.cdf(0))`

Whichever approach you pick make sure you have imported the members you are accessing, otherwise, the "Name 'scipy' is not defined" error occurs.

The error occurs for multiple reasons:

- Not having the
`scipy`

package installed by running`pip install scipy`

. - 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
`scipy.py`

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

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 scipy package
with `pip3.10 install scipy`

.

shell

`pip3.10 install scipy # ๐๏ธ if you get permissions error use pip3 (NOT pip3.X) sudo pip3 install scipy`

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 scipy`

If the error persists, try restarting your IDE and development server/script.

You can
check if you have the `scipy`

package installed
by running the `pip show scipy`

command.

shell

`# ๐๏ธ check if you have scipy installed pip show scipy # ๐๏ธ if you don't have pip set up in PATH python -m pip show scipy`

The `pip show scipy`

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

`scipy`

package using the incorrect version or your IDE might be set up 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 dropdown 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 `scipy`

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 scipy in virtual environment pip install scipy`

If the `python3 -m venv venv`

command doesn't work, try the following 2
commands:

`python -m venv venv`

`py -m venv venv`

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

`scipy.py`

because that would shadow the original `scipy`

module.You also shouldn't be declaring a variable named `scipy`

as that would also
shadow the original module.

If the error is not resolved, try to uninstall the `scipy`

package and then
reinstall it.

shell

`# ๐๏ธ check if you have scipy installed pip show scipy # ๐๏ธ if you don't have pip set up in PATH python -m pip show scipy # ๐๏ธ uninstall scipy pip uninstall scipy # ๐๏ธ if you don't have pip set up in PATH python -m pip uninstall scipy # ๐๏ธ install scipy pip install scipy # ๐๏ธ if you don't have pip set up in PATH python -m pip install scipy`

Try restarting your IDE and development server/script.

You can also try to upgrade the version of the scipy package.

shell

`pip install scipy --upgrade # ๐๏ธ if you don't have pip set up in PATH python -m pip install scipy --upgrade`

If the error persists, follow the operating system-specific instructions on how to install

`scipy`

.- Install SciPy on Windows
- Install SciPy on macOS or Linux
- Install SciPy in Visual Studio Code
- Install SciPy in PyCharm
- Install SciPy in Anaconda
- Install SciPy in Jupyter Notebook

**To install the SciPy module on Windows:**

- Type CMD in the search bar and open the Command Prompt application.
- Type
`pip install scipy`

and press Enter.

cmd

`pip install scipy # ๐๏ธ for Python 3 pip3 install scipy # ๐๏ธ if you don't have pip in your PATH environment variable python -m pip install scipy # ๐๏ธ for Python 3 python3 -m pip install scipy # ๐๏ธ using py alias py -m pip install scipy # ๐๏ธ if you get permissions error pip install scipy --user # ๐๏ธ for Anaconda conda install -c anaconda scipy`

If the command doesn't succeed, try running CMD as an administrator.

Right-click on the search result, click on "Run as administrator" and run the pip install command.

If you get the error
'pip' is not recognized as an internal or external command,
use the `python -m`

command when installing `SciPy`

.

shell

`python -m pip install scipy python3 -m pip install scipy py -m pip install scipy`

Alternatively, you can install the `scipy`

module in a virtual environment:

- Open the root directory of your project.
- Press
`Shift`

and right-click in Explorer.

- Click on "Open PowerShell window here".
- Run the following commands.

PowerShell

`# ๐๏ธ might also be: "python3 -m venv venv" python -m venv venv # ๐๏ธ activate on Windows (PowerShell) venv\Scripts\Activate.ps1 # ๐๏ธ activate on Windows (cmd.exe) venv\Scripts\activate.bat # ๐๏ธ install scipy in virtual environment pip install scipy`

If the `python -m venv venv`

command doesn't work, try the following 2 commands:

`python3 -m venv venv`

`py -m venv venv`

.

If you see an error message that ps1 cannot be loaded because running scripts is disabled on this system, run the following command, type "yes" when prompted and rerun the activation command.

PowerShell

`Set-ExecutionPolicy RemoteSigned -Scope CurrentUser`

You can verify that the

`SciPy`

module is installed by using the `pip show scipy`

command.PowerShell

`pip show scipy pip3 show scipy python -m pip show scipy python3 -m pip show scipy`

The `pip show scipy`

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.

**To install SciPy on macOS or Linux:**

- Search for "terminal" and start the application.
- Type
`pip install scipy`

and press Enter.

terminal

`pip install scipy # ๐๏ธ for Python 3 pip3 install scipy # ๐๏ธ if you get permissions error sudo pip3 install scipy # ๐๏ธ if you don't have pip in your PATH environment variable python -m pip install scipy # ๐๏ธ for python 3 python3 -m pip install scipy # ๐๏ธ alternative if you get permissions error pip install scipy --user # ๐๏ธ alternative for Debian (Ubuntu) sudo apt-get install python3-scipy # ๐๏ธ Alternative for Fedora sudo dnf install python3-scipy # ๐๏ธ Alternative for macOS brew install scipy # ๐๏ธ for Anaconda conda install -c anaconda scipy`

If you get an error that `pip`

isn't found, use the `python -m`

command.

terminal

`python -m pip install scipy python3 -m pip install scipy`

If you get a permissions error, prefix the command with `sudo`

.

terminal

`sudo pip install scipy sudo pip3 install scipy`

Alternatively, you can install the `scipy`

package in a virtual environment:

- Open your terminal in the root directory of your project.
- Run the following commands.

shell

`# ๐๏ธ could also be "python -m venv venv" python3 -m venv venv # ๐๏ธ activate virtual env on macOS or Linux source venv/bin/activate # ๐๏ธ install scipy in virtual environment pip install scipy`

Your virtual environment will use the version of Python that was used to create it.

If the

`python3 -m venv venv`

command doesn't work, use `python -m venv venv`

instead.You can use the `pip show`

command to verify
`SciPy`

has been installed
successfully.

shell

`pip show scipy pip3 show scipy python -m pip show scipy python3 -m pip show scipy`

The `pip show scipy`

command will either state that the package is not installed
or show a bunch of information about the package.

**To install SciPy in Visual Studio Code:**

- Press CTRL + ` (Backtick) on your keyboard to open the terminal.
- Run the
`pip install scipy`

command to install the`SciPy`

module.

terminal

`pip install scipy # ๐๏ธ for Python 3 pip3 install scipy # ๐๏ธ if you get permissions error sudo pip3 install scipy # ๐๏ธ if you don't have pip in your PATH environment variable python -m pip install scipy # ๐๏ธ for python 3 python3 -m pip install scipy # ๐๏ธ using py alias py -m pip install scipy # ๐๏ธ alternative if you get permissions error pip install scipy --user`

You can also open the terminal in Visual studio code by pressing

`CTRL+Shift+P`

and then typing "View: Toggle Terminal".When installing Python modules in Visual Studio code, make sure that your IDE is configured to use the correct Python version.

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 dropdown 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.

You can use the `python --version`

command if you need to get your version of
Python.

terminal

`python --version python3 --version`

You can also try creating a virtual environment if you don't already have one.

terminal

`# ๐๏ธ could also be "python -m venv venv" or "py -m venv 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 scipy in virtual environment pip install scipy`

Your virtual environment will use the version of Python that was used to create it.

**To install SciPy in PyCharm:**

- Press
`Alt+F12`

on your keyboard to open the terminal. - Run the
`pip install scipy`

command to install the`scipy`

module.

terminal

`pip install scipy # ๐๏ธ for Python 3 pip3 install scipy # ๐๏ธ if you get permissions error sudo pip3 install scipy # ๐๏ธ if you don't have pip in your PATH environment variable python -m pip install scipy # ๐๏ธ for python 3 python3 -m pip install scipy # ๐๏ธ using py alias py -m pip install scipy # ๐๏ธ alternative if you get permissions error pip install scipy --user`

Alternatively, you can use the IDE itself to install the module.

- Click on "File" > "Settings" > "Project" > "Python Interpreter".
- Click on the
`+`

icon and type`scipy`

. - Click on "Install Package".

When installing Python modules in PyCharm, make sure that your IDE is configured to use the correct version of Python.

Click on "File" > "Settings" > "Project" > "Python Interpreter".

Then select the correct Python version from the dropdown 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.

You can use the `python --version`

command if you need to get your version of
Python.

terminal

`python --version python3 --version`

**To install SciPy in Anaconda:**

- Open your Anaconda Navigator.
- Click on "Environments" and select your project.
- Type
`scipy`

in the search bar to the right. - Tick the
`scipy`

package and click on "Apply".

Alternatively, you can install the `SciPy`

package with a command.

If you are on Windows, search for **"Anaconda Prompt"** and open the
application.

If you are on macOS or Linux, open your terminal.

Run the following command to install the `SciPy`

package.

shell

`# ๐๏ธ using conda conda install -c anaconda scipy # ๐๏ธ Alternatively use `pip` pip install scipy # ๐๏ธ for Python 3 pip3 install scipy # ๐๏ธ if you get permissions error sudo pip3 install scipy # ๐๏ธ if you don't have pip in your PATH environment variable python -m pip install scipy # ๐๏ธ for python 3 python3 -m pip install scipy # ๐๏ธ using py alias py -m pip install scipy # ๐๏ธ alternative if you get permissions error pip install scipy --user`

Click on the following article if you need to install a specific version of the package using Anaconda.

**To install SciPy in Jupyter Notebook:**

- Open your terminal and type "jupyter notebook".

- Click on "New" and then "Terminal" in the browser tab.

- Type
`pip install scipy`

and press Enter.

shell

`# ๐๏ธ using pip pip install scipy # ๐๏ธ for Python 3 pip3 install scipy # ๐๏ธ if you get permissions error sudo pip3 install scipy # ๐๏ธ if you don't have pip in your PATH environment variable python -m pip install scipy # ๐๏ธ for python 3 python3 -m pip install scipy # ๐๏ธ using py alias py -m pip install scipy # ๐๏ธ using conda conda install -c anaconda scipy # ๐๏ธ alternative if you get permissions error pip install scipy --user`

Alternatively, you can use the Python ipykernel.

- Open your terminal and type "jupyter notebook".

Click on "New" and then click on "Python 3 (ipykernel)".

Type

`!pip install scipy`

and click on "Run".

Note that the `pip install`

command must be prefixed with an exclamation mark if
you use this approach.

shell

`!pip install scipy`

Once you type the command, click "Run" to install the `scipy`

module.

If you get a permissions error, e.g. "[WinError: 5] Access is denied", add the
`--user`

option to the installation command.

shell

`!pip install scipy --user`

If the error persists, try to restart the Jupyter Kernel and rerun the command.