The difference between a list, a ganso, a dictionary in Python

	Defined	Method
List	Can contain different types of objects, you can add or subtract elements, you can combine with other lists or split a list, using [] to define the eg:alist=[123, ' abc ', 4.56,[' inner ', ' list '],7-9j]	1.list (str): Convert str to list type, str can make a string or tuple type 2.alist.append (' Test '): Append element to list del alist: Delete the entire list 4.cmp (list1,list2): Compare the size of two lists 5. Len (list): Returns the number of list elements 6.sorted (list): Sort elements in a list using a dictionary order 7.reversed (list): The position of an element in the inverted list 8.list.count (obj): Returns the number of times the object obj appears in the list 9.list.extend (seq): Adds the contents of the sequence SEQ to the list 10.list.insert (index,obj): Inserts an Obj object where the index amount is index 11.list.pop (index=-1): Deletes and returns the object at the specified position, which is the last object by default from list
Yuan zu	can contain different types of objects, but they are immutable and cannot be defined by adding or subtracting elements, using () to define eg:atuple= (123, ' abc ', 4.56,[' inner ', ' list ') , 7-9j)	1.tuple (obj): Convert object obj to a tuple object, obj can be any string or list 2. The Del,cmp,len,max,min method for the list also applies to tuple, but because Ganso is immutable, substitution, addition, sorting, and so on are not possible
Dictionary	Key-value pairs, defined with {} eg:adict={' name ': ' Cynthia ', ' Age ': 18}	1.dict1=dict ([' X ', 1],[' Y ', 2]) create a dictionary:d ICT () 2.dict1={}.fromkeys ((' x ', ' y '), -1): Fromkeys () creates a default dictionary in which the elements in the dictionary have the same value 3.dict1.keys (): Gets the list of key values for the dictionary 4.dict1.has_key (' x '): Determines if the dictionary has an ' x ' key value, returns the bool type 5.dict.get (Key,default): Returns the value of the key value key, if key does not exist, returns the value of default 6.dict.items (): Returns the value of a key-value pair list 7.dict.values (): Returns a list of all values in the dictionary 8.dict.update (DICT2): Adds a Dict2 key-value pair list to the dictionary Dict 9.dict.pop (Key): Returns value of key value key 10.setdefault (): Similar to the Get method, the value of the given key can be obtained, in addition SetDefault can also be automatically weight does not contain a given key in the case of setting the corresponding Key-value 11.clear (): Clears all items in the dictionary. In-place operation, no return (or return value of None) 12.copy (): Returns a new dictionary with the same key-value as a shallow copy (shallow copy)

The difference between a list, a ganso, a dictionary in Python