Dict of Python data types

1. Clear: Delete all elements

#D. Clear (), None.   from ddic_a   ={1:'kong',2:'zha',3: ' Gen ' }dic_a.clear () print (dic_a) result: {}

2, Fromkeys (): Build a new dictionary from the Key,value of the sequence key and value generation dictionary

#dict.  Fromkeys(seq[, value]))      

SEQ: It's for the dictionary key.
Value: is the default value of the dictionary

Seq = ('Name',' Age','Sex') New_dic= Dict.fromkeys (seq,Ten) print (new_dic) Result: {' Age':Ten,'Sex':Ten,'Name':Ten}

3. Get: Get dictionary values

#Get(self, k, d=None)
= {1:'kong',2:'zha'}print (dic. Get (1,10)) Result:'kong'

4. Items: Returns a collection object of a class

DIC = {1:'kong',2:'zha'}print ( Dic.items ()) Result: Dict_items ([1'kong'), (2' Zha ')])

5. Keys: Returns a collection object of a class

DIC = {1:'kong',2:'zha'=  Dic.keys () print (new_dic) for in new_dic:    print (x) Results: Dict_keys ([1  2])12

6. Pop: Delete the key value specified by the dictionary, return a value, you must specify the key to delete

return= {1:'kong',2:'zha' }print (Dic.pop (1)) print (DIC) Result: kong{2'Zha '}

7, Popitem: Random removal of the dictionary key-value pairs, return a tuple, if the dictionary is empty error

return  as a         2 if  is  = {1:'kong',2:'zha' ,3:'gen'}print (Dic.popitem ()) print (DIC)
Results:

(1, ' Kong ')
{2: ' Zha ', 3: ' Gen '}

8. SetDefault: If the key is in the dictionary, the value corresponding to the key is returned, if the key is not in the dictionary, the key value is inserted into the dictionary.

#D. SetDefault (K[,d]), D.Get(K,d), alsoSetD[k]=difK NotinchDdic= {1:'Kong',2:'Zha',3:'Gen',4:'FF',5:'pp'}pp= Dic.setdefault (6,'PPP') print (DIC) print (PP) result: {1:'Kong',2:'Zha',3:'Gen',4:'FF',5:'pp',6:'PPP'}PPP

9, Update: With Dic2 updated Dic1: If the Dic2 key does not exist in Dic1, then Dic2 inserted into Dic1, or more Dic2 key value, update Dic1

Dic1 = {'Name':'Kong',' Age': -}dic2= {'Name':'hucli','Sex':'M'}print (Dic1,dic2) dic1.update (dic2) print (DIC1) results: {' Age': -,'Name':'Kong'} {'Name':'hucli','Sex':'M'}{' Age': -,'Name':'hucli','Sex':'M'}

10. Values: Returns all values of the dictionary

Object Providing a view on D's valuesdic1 = {'Name':' Kong ','age':}print (dic1.values ()) Result: Dict_values ([  - ' Kong '])

Dict of Python data types