python之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"])#在列表末尾增长一个数据项凑集
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.(0,"chapman")#在指定的地位增长数据项
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等的应用以及逻辑

 


 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_something(the_list):#定义一种函数
6 for each_item in the_list:#for in轮回迭代处理惩罚列表,从列表肇端地位到末尾
7 if isinstance(each_item,list):#isinstance()检测each_item里每一项
8 #是不是list类型
9 print_something(each_item)#若是是,调用函数print_something
10 else:print(each_item)#若是不是,输出这一项
11
12 print_something(movies)#在movies列表中调用函数
13 """
14 之前if else语句不合错误齐导致报错
15 """

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