Python

Exercises: Define a method Get_num (NUM), the num parameter is a list type, and the element in the list is a numeric type. The other type is an error, and returns an even list: (Note: The elements in the lists are even).def get_num(num):

When we log in to Linux, the input password is not displayed, and in Python it is also possible to do so, which is the Getpass module (not available in pycharm)The Getpass module contains several more useful features:1, GetpassUsage: Getpass.getpass

Implicitly-based class objectEach Python class implicitly inherits an objectFull-Text Code example implementation: enumeration of Poker's suit and card face valueOne, _init () __ Method: Object InitializationDisplay instead of implicit: __init () __

1,python Environment2, write the code directly belowImport UrllibImport reImport timedef gethtml (URL):page = Urllib.urlopen (URL)html = Page.read ()html = Html.decode (' Utf-8 ')return HTMLdef getimgurl (HTML):Str_re = R ' ]src[=\ "\ ']+ ([^\" \ '])

One, character encoding and transcoding1. In Python2 the default encoding is ASCII, python3 default is Utf-82.unicode is divided into utf-32 (4 bytes), utf-16 (accounting for two bytes), Utf-8 (1-4 bytes), so utf-16 is now the most commonly used

Schema.dump and Schema.load The Schema.dump () method returns an Marshresult object, marshmallow the official API says that the dump and load methods return all Dict objects, but to view the source code, the Marshresult object is a namedtuple.#

One, process and thread Overview: Process, which is the basic unit of allocating and managing resources during the execution of a program that executes concurrently, each of which has its own address space. threads, which are part of a

List Operation List Method Example Increase List.append (obj)add element to end eg.>>> list1=[' hello ', ' world ', ' How ', ' is ', ' you '>>> list1.append ('! ')>>> List1[' Hello ', '

Parisgabrielbasics of getting started with PythonAdd:Mainstream 3 operating large system WINDOWS:WINXP Win7 Win8 Win10unix:solaris (SUN)IOS (Apple Mobile)Mac OSLinux: (Linux-based UNIX-independent system)Android (Android)Ubuntu 16.04 (current

Request Library UrllibUrllib is mainly divided into several partsUrllib.request Sending requestsUrllib.error the exception that occurred during the processing of the requestUrllib.parse Processing URLsUrllib.robotparser parsing Robots.txt------the

Today, my colleague asked me if I have a website to download the novel, I said no ah you want to find which novel (in the Heart a little despise him, thought now what novel in the online not all can find it, self-confident search ability of I

# # Higher Order function-functions that accept functions as arguments are called higher-order functionsdef fn (num): # receives parameters and prints print (num)def# The Accept function is a parameter # ) # Ten　　　　-in Python, the

1. Deep copy vs Shallow copyDeep and shallow copies in Python are the same as in Java, The so-called shallow copy is the copy of the reference. (The data inside is not copied, and the data is in the same address space as the data in

1 classCompany :2 def __init__(Self, name, staffs=[]):#There is no incoming list when the entity object is instantiated, causing the entity object to share the same default list object3Self.name =name4Self.staffs =Staffs5 6 defAdd (Self,

S is a stringS.isalnum () All characters are numbers or lettersS.isalpha () All characters are lettersS.isdigit () All characters are numbersS.islower () All characters are lowercaseS.isupper () All characters are uppercaseS.istitle () All words are

There are three conditions for running unit tests in an official document1. Create a tests child package for the module and set up the test case2. Set the configuration item test_enable to True, the command line through the--test-enable option3. The

# # Sequential structure-The most basic structure is the execution of a statement in the order from top to bottom.# # Branching structureIf condition:StatementStatement...Elif Condition>:StatementStatement...ElseStatementStatement...-If statement

1, using the module reasonTo save memory2, what is the module Python code or C language code Sort by function 3. Module classification Built-in modules, modules included in the Python interpreter Expansion module,

Test environment Python3, do not know Python2 can run.The code is as follows:#-*-Coding:utf-8-*-Import Turtle as TT.pensize (4) # Set the size of the brushT.colormode (255) # Set GBK color range to 0-255T.color ((255,155,192), "Pink") # Set brush

69206210 Today took time to learn a bit before the pillow library, previously seen remember this library can be added to the picture text plus numbers, but also to convert the picture into a character painting, but has not been looking to learn