Pyhton——List，Sorting，Tuples类型

最新推荐文章于 2025-08-18 23:17:42 发布

最新推荐文章于 2025-08-18 23:17:42 发布 · 115 阅读

文章标签：

#python

本文档通过实际操作示例介绍了Python中列表(lists)和元组(tuples)的基本使用方法，包括创建、修改、排序及与其他数据类型的转换等。同时，还探讨了列表推导式的应用，并对比了列表与元组的不同特性。

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以下是学习goole PYTHON教程过程中的一些笔记。

'#' 后面的是输出，希望你能从中获取你想要的。

Lists,Sorting,and Tuples

[1, 2, 3]

#[1, 2, 3]

a = [1, 2, 3]

#[1, 2, 3]

a = [1, 2, 'aaaa']

#[1, 2, 'aaaa']

len(a)

[1, 2, 'aaaa'] + [3, 4]

#[1, 2, 'aaaa', 3, 4]

a = [1, 2, 3]

b = a

#[1, 2, 3]

a[0]

a[0] = 13

#[13, 2, 3]

b = a[:]

#[13, 2, 3]

a == b

#True

a[1:3]

#[2, 3]

a[:-1]

#[13, 2]

for num in a:print num

#13

a.apend(4)

#[13, 2, 3 , 4]

None

a.pop(0)

#13

#[2, 3, 4]

del a

#error

a = [1, 2, 3]

a[1]

del a[1]

[1, 3]

b = 12

a = b

del a

#12

a = [4, 2, 1, 6]

sorted(a)

#[1, 2, 4, 6]

help(sorted)

#it will show the detail how to user the sorted method

sorted(a, reverse=True)

#[6, 4, 2, 1]

a = ['ccc', 'bb', 'd', 'bb']

sorted(a)

#['aaaa', 'bb', 'ccc', 'd']

sorted(a, key=len)

#['d', 'bb', 'ccc', 'aaaa']

#['ccc', 'bb', 'd', 'bb']

a[1] = 'aaaz'

#['ccc', 'aaaz', 'd', 'bb']

def Last(s):return s[-1]

#<function Last at 0x011F0E30>

#['ccc', 'aaaz', 'd', 'bb']

sorted(a, key=Lost)

#['bb', 'ccc', 'd', 'aaaz']

':'.join(a)

#'cc:aaaz:d:bb'

'\n'.join(a)

#'ccc\naaaz\nd\nbb'

b =':'.join(a)

#'cc:aaaz:d:bb'

':'.split(b)

#[':']

b.split(':')

#['ccc', 'bb', 'd', 'bb']

result = []

for s in a: result.append(s)

result

#['ccc', 'bb', 'd', 'bb']

range(20)

#[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19]

(1, 2, 3)

#(1, 2, 3)

a = (1, 2, 3)

len(a)

a[0]

a[0] = 13
#Traceback (most recent call last):
# File "<pyshell#34>", line 1, in <module>
# a[0] = 13
#TypeError: 'tuple' object does not support item assignment

a = [(1, "b"), (2, "a"), (1, "a")]

#[(1, "b"), (2, "a"), (1, "a")]

sorted(a)

#[(1, 'a'), (1, 'b'), (2, 'a')]

(x, y) = (1, 2)