元组tuple=(“aaa”,“bbb”)

增

元组不能被增加，但可以对多个元组进行 合并

# @Author : Stuff
a = ("aaa","bbb","ccc")
b = (111,222,333)
c =a+b
print(c)
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('aaa', 'bbb', 'ccc', 111, 222, 333)
1

删

注意，元组被删除后再查询会报错

# @Author : Stuff
a = ("aaa","bbb","ccc")
print(a)
del a
print("after del",a)
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Traceback (most recent call last):
  File "E:/python work/review/test.py", line 5, in <module>
    print("after del",a)
NameError: name 'a' is not defined
('aaa', 'bbb', 'ccc')
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改

元组不能被更改，但可以对多个元组进行 合并
例如

# @Author : Stuff
a = ("aaa","bbb","ccc")
b = (111,222,333)
c =a+b
print(c)
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('aaa', 'bbb', 'ccc', 111, 222, 333)
1

查

# @Author : Stuff
a = ("aaa","bbb","ccc")
b = (111,222,333)
c =a+b
print(c)
print(c[0])
print(c[1:4])
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('aaa', 'bbb', 'ccc', 111, 222, 333)
aaa
('bbb', 'ccc', 111)
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列表list=[“aaa”,“bbb”,“ccc”]

列表是有顺序的。可通过索引值进行查找

增

# @Author : Stuff
a = []
a.append("aaa")
a.append("bbb")
print(a)
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['aaa', 'bbb']
1

删

# @Author : Stuff
a = []
a.append("aaa")
a.append("bbb")
print(a)
del(a[0])
print(a)
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['aaa', 'bbb']
['bbb']
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2

改

# @Author : Stuff
a = []
a.append("aaa")
a.append("bbb")
print(a)
a[1] = 333
print(a)
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['aaa', 'bbb']
['aaa', 333]
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2

查

# @Author : Stuff
a = ["aaa","bbb","ccc"]
print(a[1:4])
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['bbb', 'ccc']
1

字典dict={“aaa”:111,“bbb”:222,“ccc”:333}

增

# @Author : Stuff
a={"aaa":111,"bbb":222,"ccc":333}
a["aaa"]=1
a["ddd"]=444
print(a)
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{'aaa': 1, 'bbb': 222, 'ccc': 333, 'ddd': 444}
1

删

# @Author : Stuff
a={"aaa":111,"bbb":222,"ccc":333}
a["aaa"]=1
a["ddd"]=444
print(a)
del a["aaa"]
print(a)
dict.clear(a)
print(a)
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{'aaa': 1, 'bbb': 222, 'ccc': 333, 'ddd': 444}
{'bbb': 222, 'ccc': 333, 'ddd': 444}
{}
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改

# @Author : Stuff
a={"aaa":111,"bbb":222,"ccc":333}
a["aaa"]=1
a["ddd"]=444
print(a)
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{'aaa': 1, 'bbb': 222, 'ccc': 333, 'ddd': 444}
1

查

注意
当查询到字典里没有key的时候会报错

# @Author : Stuff
a={"aaa":111,"bbb":222,"ccc":333}
print(a["bbb"])
print(a["ddd"])
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Traceback (most recent call last):
  File "E:/python work/review/test.py", line 4, in <module>
    print(a["ddd"])
KeyError: 'ddd'
222
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