Python's Dictionary Dictionary

Create:

Dict = {' Name ': ' Zara ', ' age ': 7, ' Class ': ' First '};


Delete:

Del dict[' Name ']; # Delete key is ' Name ' entry dict.clear ();     # Empty dictionary all Entries del dict;        # Delete Dictionary

Properties of Dictionary Keys

A dictionary value can take any Python object without restriction, either as a standard object or as a user-defined one, but not a key.

Two important points to keep in mind:

1) The same key is not allowed to appear two times. When created, if the same key is assigned a value of two times, the latter value is remembered

2) The key must be immutable, so it can be used as a number, a string, or a tuple, so you can't use a list.

Dictionary built-in functions & methods

There are many, specifically see the manual

The Python dictionary contains the following built-in functions:

Serial Number	Functions and descriptions
1	CMP (Dict1, DICT2) Compares two dictionary elements.
2	Len (dict) Calculates the number of dictionary elements, that is, the total number of keys.
3	STR (DICT) The output dictionary is a printable string representation.
4	Type (variable) Returns the type of the variable entered and returns the dictionary type if the variable is a dictionary.

The Python dictionary contains the following built-in methods:

Serial Number	Functions and descriptions
1	Radiansdict.clear () Delete all elements in a dictionary
2	Radiansdict.copy () Returns a shallow copy of a dictionary
3	Radiansdict.fromkeys () Create a new dictionary with the keys to the dictionary in sequence seq, Val is the initial value corresponding to all keys in the dictionary
4	Radiansdict.get (Key, Default=none) Returns the value of the specified key if the value does not return the default value in the dictionary
5	Radiansdict.has_key (Key) Returns False if the key returns true in the dictionary Dict
6	Radiansdict.items () Returns an array of traversed (key, value) tuples as a list
7	Radiansdict.keys () Returns a dictionary of all keys in a list
8	Radiansdict.setdefault (Key, Default=none) Similar to get (), but if the key does not exist in the dictionary, the key is added and the value is set to default
9	Radiansdict.update (DICT2) Update the key/value pairs of the dictionary dict2 to the Dict
10	Radiansdict.values () Returns all values in the dictionary as a list

Python's Dictionary dictionary