PYTHON

python pip install matplotlib

pip install matplotlib

matplotlib install

pip3 install matplotlib

install matplotlib pip

// install matplotlib

pip install matplotlib

// using conda

conda install -c conda-forge matplotlib 

pypy install matplotlib

first add pypy and its scripts folder to path!
then use the following code in terminal:

pypy3 -m pip install matplotlib

do not worry if it looked stuck at the end.

pip matplotlib

! pip install matplotlib