python列表(list)用法示例代码

x=['red','white','black','green']
y=['1','2','3']
①x.append('more') 
x
['red', 'white', 'black', 'green', 'more']

②list.append(x,'again')
x
['red', 'white', 'black', 'green', 'again']

③y.append(list(x)) #append添加一个列表
['1', '2', '3', ['red', 'white', 'black', 'green', 'more']]

x=['red','white','black','green']
①x.count('red')
1(出现次数为1)

x=['red','white','black','green']
y=['1','2','3']
k='meihao'

①x.extend(list(y))
['red', 'white', 'black', 'green', 'more', '1', '2', '3']
②x[len(x):]=list(k)(通过分片复制实现)
x
['red', 'white', 'black', 'green', 'm', 'e', 'i', 'h', 'a', 'o']

③x+list(k)
['red', 'white', 'black', 'green', 'm', 'e', 'i', 'h', 'a', 'o']

x=['red','white','black','green']
①x.index('red')
0
 

x=['red','white','black','green']
k='meihao'
①x.insert(2,'more')
x
['red', 'white', 'more', 'black', 'green']
 
②x[0:0]=k(通过分片)
x
['m', 'e', 'i', 'h', 'a', 'o', 'red', 'white', 'black',

x=['red','white','black','green']
①x.pop
'green'
x
['red', 'white', 'black']
 

x=['red','white','black','green']
x.remove('red')
x
['white', 'black', 'green']
 

name = list("scott")
name
['s', 'c', 'o', 't', 't']
name.reverse()
name
['t', 't', 'o', 'c', 's']
 

>>> result = [8,5,5,3,9]
 >>> result.sort()
 >>> result
 [3, 5, 5, 8, 9]

 >>> result = [8,5,5,3,9]
 >>> result2 = sorted(result)
 >>> result
 [8, 5, 5, 3, 9]
 >>> result2
 [3, 5, 5, 8, 9]