fish_prompt.fish

function fish_prompt --description Based\ on\ \'Simple\ Pythonista\',\ displays\ GIT\ and\ Job\ count\ info\ as\ well.
        set_color yellow
        printf '%s' (whoami)
        set_color normal
        printf ' at '
        
        set_color magenta
        printf '%s' (hostname|cut -d . -f 1)
        set_color normal
        printf ' in '
        
        set_color $fish_color_cwd
        printf '%s' (prompt_pwd)
        set_color normal
        
        set -g __fish_git_prompt_show_informative_status 1
        __fish_git_prompt
        
        set jobs_count (count (jobs -p))
        echo -n -s " j:" $jobs_count
        
        # Line 2
        echo
        if test $VIRTUAL_ENV
                printf "(%s) " (set_color blue)(basename $VIRTUAL_ENV)(set_color normal)
        end
        printf '↪ '
        set_color normal
end

Todo: choose a color for jobs count.