Howto solve modulenotfounderror no module named numpy

The modulenotfounderror no module named numpy error occurs when:

• Not having numpy module installed
• Using python <= 2
• Creating a virtual environment with Python 2
• Installing numpy globally

To solve the error, we need to:

• Install numpy module
• Use python <= 3
• Install numpy In virtualenv
• Install and Execute with the same Python version

Install matplotlib module

Install numpy via pip:

# Python 2
pip install numpy
# Python 3
pip3 install numpy

If you get a permissions error:

# Python 2
sudo pip install numpy
# Python 3
sudo pip3 install numpy

Install matplotlib via anaconda:

conda install -c conda-forge numpy

Use Python version <= 3

Probably the new version of numpy is dropped using Python 2. Therefore we recommend you use Python version 3.

python3 my_code.py

Install matplotlib In virtualenv

Another reason for "ModuleNotFoundError: No module named 'numpy'" is you install the numpy package globally without a Virtual Environment . However, Let's see how to set up a virtualenv with Python 3

Linux

Update all Linux packages:

root@Py:~# apt-get update -y

Install python3-venv:

root@py:~# apt-get install -y python3-venv

Install virtualenv using pip:

pip3 install virtualenv

Create  Virtual Environment:

root@py:~# python3 -m venv numpy_venv

numpy_venv is the name of my virtual envormment. Now let's activate the Virtual Environment:

root@py:~# source py_venv/bin/activate

Done!

Windows

Install virtualenv using pip:

pip3 install virtualenv

Create the virtual environment:

cd my-project
virtualenv --python C:\Path\To\Python\python.exe numpy_env

Activate it:

.\py_env\Scripts\activate

Done!

Install and Execute with the same Python version

# 👇️ Python 3
pip3 install numpy

# 👇️ Execute The code with Python 3
python3 my_code.py