datetime format function

def _format_time(t):
    def _beautify(inp):
        return "0" + str(inp) if inp < 10 else str(inp)
    return "%s.%s.%s - %s:%s:%s" \
           % (_beautify(t.day), _beautify(t.month), t.year, _beautify(t.hour), _beautify(t.minute), _beautify(t.second))