The pop () function in the [Python] dictionary and List

In dictionaries and lists, the pop () function deletes a specific element and returns the deleted element to the specified variable or discards

First, the dictionary element is deleted

1.1 Clear ()

Syntax: Dict.clear ()

1 x = {'a'b' 'C': 3  }2x.clear ()3print(x,m)4# Output 5 {} None

Description: Delete all the elements

1.2 Pop ()

Syntax: Dict.pop (Key,[value])

Note: Deletes the specified key and the corresponding value, if the key and value are not present in the dictionary, returns the value corresponding to the key specified in pop (), which sets the default value.

1x = {'b': 2,'C': 3}2m = X.pop ('a', 1)3 Print(x)4 Print(m)5 #Output6{'C': 3,'b': 2}71

1.3 Popitem ()

Syntax: Dict.popitem ()

Description: Randomly deletes one of the key-value pairs and returns a two-element tuple consisting of a key-value pair

x = {'a': 1,'b': 2,'C': 3}m=X.popitem ()Print(x)Print(m)#Output{'a': 1,'b': 2}('C', 3)

2 List Element deletion

Syntax: List.pop (Index)

Note: Delete value at index, or delete the last element by default if index is not specified

x = [1,2,3,4,5= x.pop (0)print  (x)print  (m)# Output [2, 3, 4, 5]1= [1,2,3,4,5= x.pop ()print  (x)  Print  (m)# output [1, 2, 3, 4]5

The pop () function in the [Python] dictionary and List