A dictionary definition: dict = { 'name': 'wyj', 'sex': 'M', 'high': '175'}
1. The list of values:
print {dict [ 'name']} # take if error value does not exist
print {dict.get ( 'name')} # takes a value does not exist if no error is displayed None
2. Increase
dict [ 'age'] = 18 # key, if present, to modify its value
dict.setdefault ( 'age', 18) # key, if present, it is the matter.
3. Modify
dict['sex'] = 女
4. Delete
dict.pop ( 'name') # delete the specified key, it returns a value for deletion
del dict [ 'name'] # key to delete the specified
5. Empty dictionary
dict.clear()
print (dict.keys ()) # print all of the key dictionary
print (dict.values ()) # print the value of all the dictionary
Print ( dict . items ( ) ) # dictionary is converted to a list
6. dictionaries cycle
dict = {'name':'wyj','sex':'男','high':'175'}
for k in dict: # directly recycled dictionary, the dictionary is taken each time the key
value = dict.get (K) # cycle time while taking the key and the value
print (k, value) # print key and value at the same time