function prompt_char {
     git branch >/dev/null 2>/dev/null && echo '±' && return
     hg root >/dev/null 2>/dev/null && echo 'Hg' && return
     echo '○'
 }
 
 function virtualenv_info {
     [ $VIRTUAL_ENV ] && echo '('`basename $VIRTUAL_ENV`') '
 }
 
 PROMPT='
 %{$fg[magenta]%}%n%{$reset_color%} at %{$fg[yellow]%}%m%{$reset_color%} in %{$fg_bold[green]%}${PWD/#$HOME/~}%{$reset_color%}$(git_prompt_info)
 $(virtualenv_info)$(prompt_char) '
 
 ZSH_THEME_GIT_PROMPT_PREFIX=" on %{$fg[magenta]%}"
 ZSH_THEME_GIT_PROMPT_SUFFIX="%{$reset_color%}"
 ZSH_THEME_GIT_PROMPT_DIRTY="%{$fg[green]%}!"
 ZSH_THEME_GIT_PROMPT_UNTRACKED="%{$fg[green]%}?"
 ZSH_THEME_GIT_PROMPT_CLEAN=""