variable:
The function records the state, and the writer processes the changes of the state
string
number
list
Ganso
Dictionaries are used to store different states
Mutable and immutable:
Immutable: You modify the value of the variable, but its id changes, the variable is immutable
string
number
Ganso
>>> name = "aaa"
>>> print(name)
aaa
>>> name
'aaa'
>>> name
'aaa'
>>> id(name)
37541008
>>> name = "yuedapeng"
>>> name
'yuedapeng'
>>> id(name)
37537264 #Address of variable
Mutable: You modify the value of the variable, but his id does not change
list
dictionary
1. Just ask directly: Numbers
2. Access sequence:
string
list
Ganso
3. Mapping: Dictionary
4. The number of stored elements:
5. Container type: list, tuple, dictionary
6. Atoms: numbers, strings