pip updating packages

solution

1. command

   1. list all pkgs

       $ pip freeze --local
       alabaster==0.7.6
       alembic==0.8.7
       amqp==1.4.9
       anaconda-client==1.2.1
       anyjson==0.3.3
       argcomplete==1.0.0
       astropy==1.0.5
       Babel==2.1.1
       backports-abc==0.4
       backports.ssl-match-hostname==3.4.0.2
       ...
       -e git+git@gitlab.com:username/pkg.git@b351b0910698eb67e8bb31e6c1a4b8a454968cbd#egg=pkg
       ...
      

   2. remove pkg definitions

       $ pip freeze --local | grep -v '^\-e'
       # this will remove lines start with `-e`
      

   3. get pkg name from field

       $ pip freeze --local | grep -v '^\-e' | cut -d = -f 1
      

   4. add -n1 to xargs prevents stopping everything if updating one pkg fails

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

2. code

        import pip
        from subprocess import call
   
        for dist in pip.get_installed_distributions():
            call("pip install --upgrade " + dist.project_name, shell=True)
   

reference

1. upgrading-all-packages-with-pip