废话不多说，直接贴出源码

year = "2012"month = "10"day = "31"path = "D:\\Env\\bair\\"title_year = str(year)title_month = str(month)title_day = str(day)new_path_year = os.path.join(path,title_year)if not os.path.isdir(new_path_year):    os.makedirs(new_path_year) new_path_month = os.path.join(new_path_year,title_month)if not os.path.isdir(new_path_month):     os.makedirs(new_path_month)new_path_day = os.path.join(new_path_month,title_day)if not os.path.isdir(new_path_day):     os.makedirs(new_path_day)