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Python

Books

Newsletters

Set default versions (Ubuntu 18.04)

sudo update-alternatives --remove-all python
sudo update-alternatives --remove-all python3
sudo update-alternatives --install /usr/bin/python python /usr/bin/python2.7 0
sudo update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.6 0
sudo update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.7 1

Devpi

# Login
$ devpi use http://localhost:3141
$ devpi login root --password=
$ devpi use root/pypi

# List indexes
$ devpi index -l

# Create index
$ devpi index -y -c public volatile=False

Import gotchas

# fatal error: ffi.h: No such file or directory
$ sudo apt-get install libffi-dev

# Exception .... in <module> from Crypto.PublicKey import DSA
$ pip install pycrypto

Pip

# Upgrade all installed packages
$ pip freeze --local | grep -v '^\-e' | cut -d = -f 1  | xargs -n1 pip install -U