python中创建列表、元组、字符串、字典
>>> a = ["aaa","bbb","ccc"] ## 列表,中括号,逗号 >>> type(a) <class ‘list‘> >>> b = ("aaa","bbb","ccc") ## 元组,小括号,逗号 >>> type(b) <class ‘tuple‘> >>> c = "aaabbbccc" ## 字符串,引号 >>> type(c) <class ‘str‘> >>> d = {"a":"aaa","b":"bbb","c":"ccc"} ## 字典,大括号,冒号,逗号 ,键值对(当普通索引不好用时用字典) >>> type(d) <class ‘dict‘>