python print dictionary pretty

Common definition methods for Python dictionaries Define a dictionary directlyDict1 = {' x ': 1, ' Y ': 2, ' Z ': 3} Define a dictionary using the Dict methodDict2 = Dict (X=1, y=2, z=3) Define a dictionary using the Dict methodDict3 = Dict ((' x ', 1), (' Y ', 2), (' Z ', 3))) Dict built-in method

The advanced tutorial further expands the basic tutorial to illustrate the details of Python. I hope you will have a more comprehensive understanding of Python after the advanced tutorial. The basic tutorial introduces basic concepts, especially objects and classes. The advanced tutorial further expands the basic tutorial to illustrate the details of Python. I h

= Set1.difference (Set2)#difference = minus public part-Set1-set2 Print(set3) Set3= Set1.symmetric_difference (Set2)#symmetry difference = set-intersection ^ Set1 ^ Set2 Print(SET3) forValinchSet2:Print(val)Print(Set2.pop ())#you can get one, there's no guarantee what you got.

element to the dictionary:>>>dic[' Lilei '] = 99>>>print DICHere, we refer to a new key and give it the corresponding value.Circular invocation of dictionary elementsDIC = {'lilei'Lily'sam' Tom': All -in-in dic :Print Dic[key]In the loop, each key of the dict is extracted and given to the key variable.With the res

second feature in the above Code is more elegant, however, similar to dict functions, when a key is a variable, only the literal value is used.1.5 delete a dictionary You can call the built-in Python keyword del to delete a key value. >>> info = dict(name='cold', blog='linuxzen.com')>>> info{'blog': 'linuxzen.com', 'name': 'cold'}>>> del info['name']>>> info{'blog': 'linuxzen.com'} You can also use the pop

, the result of the compilation is saved in the Pycodeobject in memory, and when the Python program finishes running, the Python interpreter writes Pycodeobject back to the PYc file.When the Python program runs for the second time, the program will first look for the PYc file on the hard disk, and if it is found, load it directly or repeat the process.So we shoul

: Copy Code code as follows: >>> x=1 >>> y= (x=x+1) Syntaxerror:invalid syntaxWith #! The beginning is called the organization line, which tells you which interpreter the Linux/unix system should run when you execute your program. For example: #!/usr/bin/python The beginning of a # is called a comment line. Second, conditional statements Control Flow statement: Any conditional expression can be established by using the Or,

Python has three built-in data structures: list, ancestor, and Dictionary. This article introduces these three data structures and provides examples, let's take a closer look at the differences between the three. 1. list) List is the data structure that processes a group of ordered projects. you can store a series project in a list. The items in the list should be included in square brackets so that

analyze the figure above. Except the root node, each subnode stores only one character. Go and golang share the go prefix. php, perl, and python only share the p prefix. To sort the dictionary, the characters stored on each layer of nodes are stored in alphabetical order (this is related to the Traversal method ). Let's take a look at how to sort a single character in the

the user selects the product, checks whether the balance is enough, is enough directly to deduct the paragraph, is not enough to remindCan exit at any time, print purchased goods and balances when exiting #购物车练习题 Shoplist = [1, iphone, 6000], [2, Mac Pro, 12000], [3, "ipad Air", 8000], [4, "Chicken", 5], [5, "eggs", +], [6, "Bi" Ke ", 500]]Mall = []salary = Int (input ("Please input your Salary:"))While True:For I in range (0, Len (shoplist)):

The derivation of comprehensions (also known as analytic) is a unique feature of Python. Derivation is the structure of another new data series that can be built from one data series. List-derived Dictionary (dict) derivation formula Set (set) derivation List derivation one, use [] to generate listBasic format for inch if the condition]expression# list generates an element expr

the value of key is the set typec['a'].add (1) c['a'].add (2) c['a'].add (2) c['b'].add (4)Print('the value of key is a dictionary of the list type:', D)Print('the value of key is a dictionary of the set type:'C>>> ================================ RESTART ================================>>>the value of key is a

I want to explain the print of Python and learn pythonprint. Eval () Let's take a look at this stuff before we print it. It is not useless, because it may be used in some cases. Copy codeThe Code is as follows:>>> Help (eval) # This is a rare concept. If you don't understand how to use it, use this document. Help on built-in function eval in module _ builtin __:

The dictionary is the only built-in mapping type in Python. The values in the dictionary are not in a special order, but are stored in a specific key. A key can be a number, a string, or even a tuple. 1. Creating and Using dictionaries Dictionaries can be created in the following ways: Copy CodeThe code is as follows: Phonebook = {' Alice ': ' 2341 ', ' Beth ':

to choose a hash key is because its value cannot be changed.Numbers and strings can be used as a dictionary key, tuples are immutable but may not be immutable, so the use of tuples to make valid keys must be restricted: if the metaOnly immutable parameters such as numbers and strings can be included in a group as valid keys in a dictionary. Example:# VI userpw.py #!/usr/bin/env