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=""