Common Methods for operating dictionary types in python

The has_key () method can check whether the dictionary contains the specified key. If yes, True is returned. Otherwise, False is returned.
Syntax format:
Dictionary_name.has_key (key)

Dict1 = {'01': 'yangry', '02 ': 'weild', '03': 'hexh', '04': 'huangmg '}
Print dict1.has _ key ('02 ')
Print dict1.has _ key ('08 ')

# Result
True
False

2. clear () method

Used to clear all the items in the dictionary without returning values.

Usage:

Dictionary_name.clear ()

3. copy method

The copy () method returns a new dictionary with the same key-value pairs in the following format:

Dictionary_targetname = dictionary_sourcenme.copy ()

4, fromkeys () method

Use the given key to create a new dictionary. The value corresponding to each key value is None.

Dictionary_name.fromkeys ([key1, key2,...], (default_value ))

5. update () method

Format:

Update_dictionary.update (source_dictionary)

Mydict1 = {'1': 'yy11', '2': 'yy22', '3': 'yy33 '}
Newdict = {'2': 'success '}

Mydict1.update (newdict)
Print mydict1

# Result
{'1': 'yy11', '3': 'yy33', '2': 'success '}