python print dictionary pretty

This article mainly introduces how to add entries to a dictionary using python. it is a practical dictionary operation technique and provides simple annotations for examples, for more information about how to add a dictionary entry using python, see the following example. Sh

" Print (list2) print (LIST3) #根据id可知, the assignment operation of the dictionary creates a label that points to the # data, not a true copy a={"name": "The Little Turtle "}b=aprint (ID (a)) print (ID (b)) print (b) #将a指向了空字典, instead of changing the size of its data # here

delete a single element also clears the dictionary, emptying only one operation.Show Delete a dictionary with the Del command, as in the following example:#!/usr/bin/pythonDict= {'Name':'Zara',' Age': 7,'Class':' First'};deldict['Name'];#Delete key is ' Name ' entryDict.clear ();#Empty dictionary all entriesdelDict;#Delete DictionaryPrint "dict[' age ']:", dict[

This article mainly introduces the Python dict dictionary structure operation method learning notebook. The dictionary operation is the basic knowledge in the Python getting started learning. For more information, see I. Basic dictionary Methods 1. Create a

What is a dictionary? A dictionary is the only type of mapping in the Python language. A hash value (key, key) and a pointer to an object (values, value) are a one-to-many relationship that is often considered a mutable hash table in the mapping type object. The Dictionary object is mutable, which is a container type

' > >> dict.setdefault (' age ', ' a ') 18>>> dict{' Color ': ' White ', ' name ': ' Tom ', ' age ': ' Hair ': ' Black '}Pretty PrintIf you import the Pprint module in a program, you can use the Pprint () and Pformat () functions, which will print beautifully a dictionary of words.The Pprint.pprint () function is especially useful if the

unique ? B. The key in the dictionary must be immutable ? List is mutable and cannot function as key ? A tuple is immutable and can act as a key, a numeric type, and a string can act as key 2. Create: syntax: dictionary name = {key1:value1,key2:value2 ...} Code Demo: #1. Creating a Dictionary #创建一个空字典 Dict1 = {} #创建有键值对的字

(List2)) #对称差集, which takes a value that is not shared by both parties print ("--- -------") Print (List2.isdisjoint (LIST4)) #判断是否有交集print (List1 List2) #交集print (List2 | list1) #并集print (list1-list2 ) #差集print (list1 ^ list2)

One, what is a dictionary? Dictionaries are the only mapping types in the Python language. The hash value (key, key) and the object (value) in the mapped type object are one-to-many relationships and are often considered to be variable hash tables. A Dictionary object is variable and is a container type that can store any number of

; Dict.fromkeys (L1, ' over '){1: ' over ', 2: ' over ', 3: ' over '}>>> D{3: ' z ', ' x ': 1, ' y ': 3}>>> d[3]' Z '>>> d[' x ']1>>> d[0]Traceback (most recent):File "d[0]keyerror:0>>> d = {' z ': 5, ' x ': 1.5, ' y ': 3}>>> d.items ()dict_items ([' z ', 5), (' x ', 1.5), (' y ', 3)])>>> list (d.items ())[(' z ', 5), (' x ', 1.5), (' y ', 3)]>>> D.keys ()Dict_keys ([' z ', ' x ', ' y '])>>> for x in D.keys ():Print (x)Zxy>>> d1 = {' x ': 1, ' y ': 3}

values in a dictionary To traverse a dictionary (the General key), you only need to loop through its keys, like this: The code is as follows Copy Code >>> dict2 = {' name ': ' Earth ', ' Port ': 80}>>>>>>> for key in Dict2.keys ():... print ' key=%s, value=%s '% (key, Dict2[key])...Key=name, Value=earthKey=port, value=80 S

;> dic1.clear()>>> dic1{}#pop()方法删除指定键的值，并返回该值>>> dic1 = {‘name‘:‘Kobe‘,‘age‘:21}>>> dic1.pop(‘name‘)‘Kobe‘>>> dic1{‘age‘: 21}#popitem()方法随机删除键值对，并返回删除的键值对>>> dic1 = {‘name‘:‘Kobe‘,‘age‘:21}>>> dic1.popitem()(‘age‘, 21)Dictionary nesting: Dictionaries can contain dictionaries, lists, and so on.books = {"日本作家" : {"村上春树":["且听风吟","没有女人的男人们","1Q84","多崎作"],"井上靖":["敦煌"],"东野圭吾":["白夜行","解忧杂货铺","放学后"]},"欧美作家" : {"昆德拉":["庆祝无意义","不能承受生命之轻"],"菲茨杰拉德":["了不起的盖茨比"]},

to associate the value V on the key KDel D[k] Delete key to KK in D check if D contains keys to KDescription Key type: The key of the dictionary is not necessarily integer data, or it may be other immutable types Auto Add: Even if the key doesn't exist in the dictionary, it can be assigned a value so that the dictionary creates a new item and cannot associate

data type, such as a string, a number, or a tuple. To access the value of a dictionary: To access the dictionary element, you can use the familiar square brackets together to get the key to its value. The following is a simple example: ? 1 2 3 4 5 6 #!/usr/bin/python dict = {' Name ': ' Zara ', ' age ': 7, ' Class ': ' A ';

A dictionary is the only type of mapping in the Python language. A hash value (key, key) and a pointing object (value, value) in a mapped type object are a one-to-many relationship that is often considered a mutable hash table. The object of the dictionary is mutable, which is a container type that can store any number of Pyt