Python学习笔记1——人人都爱列表

一些BIF函数在列表中的应用：

 1 Python 3.3.4 (v3.3.4:7ff62415e426, Feb 10 2014, 18:13:51) [MSC v.1600 64 bit (AMD64)] on win32

 2 Type "copyright", "credits" or "license()" for more information.

 3 >>> cast=["cleese","palin","jones","idle"]

 4 >>> print(cast)

 5 ['cleese', 'palin', 'jones', 'idle']

 6 >>> print(len(cast))#显示数据项数量

 7 4

 8 >>> print(cast[1])#显示列表中第2个数据项的值

 9 palin

10 >>> cast.append("gilliam")#在列表末尾添加一个数据项

11 >>> print(cast)

12 ['cleese', 'palin', 'jones', 'idle', 'gilliam']

13 >>> cast.pop()#删除列表末尾的数据项

14 'gilliam'

15 >>> print(cast)

16 ['cleese', 'palin', 'jones', 'idle']

17 >>> cast.extend(["gilliam","chapman"])#在列表末尾增加一个数据项集合

18 >>> print(cast)

19 ['cleese', 'palin', 'jones', 'idle', 'gilliam', 'chapman']

20 >>> cast.remove("chapman")#删除指定的数据项

21 >>> print(cast)

22 ['cleese', 'palin', 'jones', 'idle', 'gilliam']

23 >>> cast.insert(0,"chapman")#在指定的位置增加数据项

24 >>> print(cast)

25 ['chapman', 'cleese', 'palin', 'jones', 'idle', 'gilliam']

26 >>> 

下面是讲定义一个def函数，isinstance()函数，for in，if else等的运用以及逻辑

 1 movies=["the holy grail",1975,"terry jone & terry gilliam",91,

 2        ["graham chapman",

 3        ["michael palin","john cleese","terry gilliam",

 4             "eric idle","terry jones"]]]

 5 def print_lol(the_list):#定义一种函数

 6         for each_item in the_list:#for in循环迭代处理列表，从列表起始位置到末尾

 7         if isinstance(each_item,list):#isinstance()检测each_item里每一项

 8                                               #是不是list类型

 9             print_lol(each_item)#如果是，调用函数print_lol

10         else:print(each_item)#如果不是，输出这一项

11 

12 print_lol(movies)#在movies列表中调用函数

13 """

14 之前if else语句不对齐导致报错

15 """

下一个笔记记录WIN7环境下python自定义模块的发布