How to solve ReadTimeoutError: HTTPSConnectionPool(host='pypi.python.org', port=443) with pip?

Question

I recently need to install some packages

pip install future
pip install scikit-learn
pip install numpy
pip install scipy

I also tried by wr

Answer 1

sudo pip install --default-timeout=100 future

or alternatively

export PIP_DEFAULT_TIMEOUT=100 worked for me on mac osx