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How to install package in jupyter notebook?

In Jupyter Notebook, the exclamation mark ! is used to run a shell command from the notebook. The following examples install numpy:

# Install with pip
!pip install numpy
# Install with conda
!conda install --yes numpy

The previous should work on most systems, however, it may fail if the default system command is not the same as your current Jupyter kernel. A more portable option is to use Jupyter kernel path with {sys.executable} or {sys.prefix}:

# Import sys to get sys.executable
import sys
# Install with pip
!{sys.executable} -m pip install numpy
# Install with conda
!conda install --yes --prefix {sys.prefix} numpy

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