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day4 -- 2022/4/2

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Promethues

#1 Created at ... [Delete] [Delete and Lock User]

# -*- coding: utf-8 -*-

# -*- coding: utf-8 -*-
# #每日学习--2022/4/2  点击“全部讨论”可看到高亮代码

#dict
d = {'angel':12, 'violet':24}
print(d['angel'])
print(len(d))
print('lisa' in d)
print(d.get('lisa'))
print(d.get('lisa',-1))
d.pop('angel') # 删除key为'angel'的键值对

#set
s = set([1,2,3])
print(s)

s.remove(4)

s1 = set([1,2,3])
s2 = set([1,3,4])

print(s1 & s2)
print(s1 | s2)

a = [1,3,5,6,2]
print(a)
a.sort()
print(a)

a= 'abc'
print(a.replace('a','A')) # replace() 创建新内存，保存替换后的字符串，并返回。
print(a)

#dict

d = {'angel':12, 'violet':24}

print(d['angel'])

print(len(d))

print('lisa' in d)

print(d.get('lisa'))

print(d.get('lisa',-1))

d.pop('angel') # 删除key为'angel'的键值对

#set

s = set([1,2,3])

print(s)

s.remove(4)

s1 = set([1,2,3])

s2 = set([1,3,4])

print(s1 & s2)

print(s1 | s2)

a = [1,3,5,6,2]

print(a)

a.sort()

print(a)

a= 'abc'

print(a.replace('a','A')) # replace() 创建新内存，保存替换后的字符串，并返回。

print(a)

Script Customazition

#2 Created at ... [Delete] [Delete and Lock User] 
s1 = set([1,2,3])
s2 = set([1,3,4])

print(s1 & s2)

这个结果输出的是{1, 3},这个是怎么算的不理解

清子

#3 Created at ... [Delete] [Delete and Lock User]

这个是求交集

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