# pip bash completion start
_pip3_completion()
{
    COMPREPLY=( $( COMP_WORDS="${COMP_WORDS[*]}" \
                   COMP_CWORD=$COMP_CWORD \
                   PIP_AUTO_COMPLETE=1 $1 2>/dev/null ) )
}
complete -o default -F _pip3_completion pip pip{,-}{3,3.5}}
# pip bash completion end