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来自 , 2021-02-12, 写在 Python, 查看 109 次.
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#list
#新建列表
testList
=
[
10086
,
'中国移动'
,
[
1
,
2
,
4
,
5
]
]
#访问列表长度
print
len
(
testList
)
#到列表结尾
print
testList
[
1
:
]
#向列表添加元素
testList.
append
(
'i
\'
m new here!'
)
print
len
(
testList
)
print
testList
[
-
1
]
#弹出列表的最后一个元素
print
testList.
pop
(
1
)
print
len
(
testList
)
print
testList
#list comprehension
#后面有介绍,暂时掠过
matrix
=
[
[
1
,
2
,
3
]
,
[
4
,
5
,
6
]
,
[
7
,
8
,
9
]
]
print
matrix
print
matrix
[
1
]
col2
=
[
row
[
1
]
for
row
in
matrix
]
#get a column from a matrix
print
col2
col2even
=
[
row
[
1
]
for
row
in
matrix
if
row
[
1
]
%
2
==
0
]
#filter odd item
print
col2even
#//python/4452
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#list #新建列表 testList=[10086,'中国移动',[1,2,4,5]] #访问列表长度 print len(testList) #到列表结尾 print testList[1:] #向列表添加元素 testList.append('i\'m new here!') print len(testList) print testList[-1] #弹出列表的最后一个元素 print testList.pop(1) print len(testList) print testList #list comprehension #后面有介绍,暂时掠过 matrix = [[1, 2, 3], [4, 5, 6], [7, 8, 9]] print matrix print matrix[1] col2 = [row[1] for row in matrix]#get a column from a matrix print col2 col2even = [row[1] for row in matrix if row[1] % 2 == 0]#filter odd item print col2even #//python/4452
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