Ubuntu – how to install numpy for python3

numpypython3software installation

I need help with installing numpy to Ubuntu 16.04.
after:

$ pip3 install numpy
come up always:
PermissionError: [Errno 13] Permission denied: '/usr/local/lib/python3.5/dist-packages/numpy'

What to do? How can i install numpy?

Best Answer

From the terminal run:

sudo apt-get install python3-numpy

This package contains Numpy for Python 3.

For scipy:

sudo apt-get install python3-scipy

For for plotting graphs use pylab:

sudo apt-get install python3-matplotlib

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Ubuntu – numpy install error

WARNING: The directory '/home/user/.cache/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.

WARNING: The directory '/home/user/.cache/pip' or its parent directory is not owned by the current user and caching wheels has been disabled. check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.

The error message is rather straight forward: It says /home/user/.cache/pip is not owned by current user. It tells you to check permissions and owner of that directory.

This you can do with ls -l /home/user/.cache/pip.

It should, as (almost?) all files in the home directory, be owned by the user. If it is not owned by user, change ownership with

sudo chown -R $USER:$USER /home/user/.cache/pip

Here we have to use sudo, as users cannot normally change ownership of files.

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Ubuntu – numpy install error

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