python列表操作使用示例分享

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复制代码 代码如下:

Python 3.3.4 (v3.3.4:7ff62415e426, Feb 10 2014, 18:13:51) [MSC v.1600 64 bit (AMD64)] on win32
Type "copyright", "credits" or "license()" for more information.

cast=["cleese","palin","jones","idle"]
print(cast)
['cleese', 'palin', 'jones', 'idle']
print(len(cast))#显示数据项数量
4
print(cast[1])#显示列表中第2个数据项的值
palin
cast.append("gilliam")#在列表末尾添加一个数据项
print(cast)
['cleese', 'palin', 'jones', 'idle', 'gilliam']
cast.pop()#删除列表末尾的数据项
'gilliam'
print(cast)
['cleese', 'palin', 'jones', 'idle']
cast.extend(["gilliam","chapman"])#在列表末尾增加一个数据项集合
print(cast)
['cleese', 'palin', 'jones', 'idle', 'gilliam', 'chapman']
cast.remove("chapman")#删除指定的数据项
print(cast)
['cleese', 'palin', 'jones', 'idle', 'gilliam']
cast.insert(0,"chapman")#在指定的位置增加数据项
print(cast)
['chapman', 'cleese', 'palin', 'jones', 'idle', 'gilliam']

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

复制代码 代码如下:

movies=["the holy grail",1975,"terry jone & terry gilliam",91,
["graham chapman",
["michael palin","john cleese","terry gilliam",
"eric idle","terry jones"]]]
def print_lol(the_list):#定义一种函数
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
if isinstance(each_item,list):#isinstance()检测each_item里每一项

是不是list类型

        print_lol(each_item)#如果是,调用函数print_lol  
    else:print(each_item)#如果不是,输出这一项

print_lol(movies)#在movies列表中调用函数
"""
之前if else语句不对齐导致报错
"""

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