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Python3 Regular Expression and python3 Regular Expression 1 ''' 2 Regular Expression, also known as a rule expression, is often abbreviated as regex, regexp, or RE in code. It is a concept of computer science. 3. Regular tables are usually used to retrieve and replace texts that conform to a certain pattern (rule. 4 Regular Expressions are a logical formula used to operate strings (including common characte

Python3 generator and python3 Generator 1 ''' 2 list generation type 3''' 4 5 # a1 = [x for x in range (10)] 6 # a2 = [x * 2 for x in range (10)] 7 # print (a1) 8 # print (a2) 9 #10 # def fun1 (x ): 11 # return x ** 3 12 # a3 = [fun1 (x) for x in range (10)] 13 # print (a3) 14 #15 # list generation type 16 # Value Method 17 # B = ['asd ', 8, 9, 10] 18 # w, x, y, z = B 19 # print (w, x, y, z) 20 # print (B)

Python3 function return, python3 function return 1 # def logger (): 2 # f = open ("loge.txt", "a") 3 # f. write ("2017-09-15 exec function") 4 # f. close () 5 # print ("2017-09-15 exec function") 6 #7 # print ("------------------") 8 #9 # Return Value 10 # def f (): 11 # print ('OK') 12 #13 # return 11 # Who to return 14 # print (123) #15 # a = f () is not executed () 16 ''' 17 returns None by default. If

Python3 network programming socket and python3 Network ProgrammingArticle content: Socket Introduction Socket Parameters Process description Socket object built-in method Basic socket instance Implement simple ssh Through socket and receive Big Data Socket Introduction A socket is also called a socket. An application sends a request to or responds to a network request through a socket so that process

Python3 data type, python3 Data Type 1. Basic Data TypesNumeric typeInteger intFloatBoolean bool: True = 1, False = 0Complex Type complexArithmetic Operator +-* // % **Assignment operator + =-= * =/= // = % = ** =Built-in functions max () and min () are used to calculate the maximum and minimum values.Import decimal 2. Sequence type'''# String str, list, And tuple# Sequence creation and type conversion# Cre

Example of python3 int integer method function, python3 integer _ Abs _ (return absolute value) N =-5 print (n. _ abs _ () # output: 5 _ Add _ (addition, Operator: +) N = 3 print (n. _ add _ (5) # output: 8 _ And _ (bitwise and OPERATION, Operator :) N = 5 print (n. _ and _ (7) # output: 5 #00000110 # equals to 00000111 # _ Bool __ # Placeholder _ Ceil _ (returns itself) N = 1234 print (n. _ ceil _ () # out

The parameters of Python3 basic functions are variable parameters. The passed parameters are converted to a list, and python3 is variable. Town Field Poetry:Listen to the words and give up the world name and benefits. I would like to be a real Tibetan.I would like to do what I have learned to achieve a conscientious blog. May the rest of the world reproduce the wisdom and purity of the body.---------------

Python3 ornament and python3 Ornament If you want to add malicious code to the program, it is a good choice to decorator! The decorator function is generally defined outside the main program and is not easy to be found; Second, the decorator function is executed before the main program runs. You can obtain the resources allocated by the system before the main program runs. The syntax rules of the dec

. Itemconfig (bulerect,fill= ' red ') #矩形框变红了 # Delete Readlinew.delete (redLine) Mainloop () using the Delete methodResult——————————————————————————————————————————The essence of the blog, in the technical part, more in the town yard a poem. Python version 3.5, System Windows7.Python is a good language and deserves to be studied hard. I am following the small Turtle Video tutorial to learn, recommended.I am a novice, so if the content of the blog can be improved, or even the wrong place, please

Python3 excellent parsing operator and python3 excellent Operator Arithmetic Operators+: Add two objects.-: Get a negative number or, or a number minus another number.*: Multiply two numbers or return a string that has been repeated for several times./: 5/2 equals 2.1 5 // 2 = 2 (/has the remainder, // get the integer)%: Modulo (5% 2 = 1)**: The power of 10 (10 ** 21) to the power of 21Comparison (relationa

Python3 Study Notes --- reference http://python3-cookbook.readthedocs.io/zh_CN/latest,Data structures and algorithms (1) 1.1 The decompression sequence is assigned to multiple variables: Any sequence (or iteratable object) can be decompressed and assigned to multiple variables through a simple assignment statement. The only premise is that the number of variables must be the same as the number of sequential

Python3 ornament and python3 OrnamentPython3 decorator 1. Closure The closure has two conditions: the function contains an inner function, and the inner function references the variable defined by the outer function. Eg: Def outer (): X = 10 Def inner (): Print (x) Return inner2. decorator The modifier is used to add functions without changing the source code of the original function. Execution Process: whe

Difference between python3.x and 2.x, and between python3.x2. x 1. Performance Py3.0 runs pystone benchmark 30% slower than Py2.5. Guido believes that Py3.0 has a huge space for optimization, which can be used for string and integer operations.To achieve good optimization results.Py3.1 performance is 15% slower than Py2.5, and there is still much room for improvement. 2. EncodingThe Py3.X source code file u

Python3 string learning tutorial, python3 string tutorial The string type is the most common type in python and is an unchangeable type. It supports single quotes, double quotes, and three quotes. The three quotes are a pair of continuous single quotes or double quotes, allowing a string to span multiple rows.String connection: the + operator mentioned above can be used for string connection. You can also d

Python3 string (7), python3 string A string is the most common data type in Python. We can use quotation marks ('or ") to create strings. It is easy to create a string by assigning a value to the variable. In python, single quotes and double quotes are identical. You can use three quotation marks (''' or ") to specify a multi-line string. Escape Character '\' Natural string, by adding r or R before the

Describes attributes, methods, encapsulation, and inheritance instances based on python3. describes python3 instances. Python class Classes in Python provide all the basic functions of object-oriented programming: the class inheritance mechanism allows multiple base classes, and the derived classes can override any methods in the base class, you can call methods of the same name in the base class. Objects c

Python3 condition control (9) and python3 condition Control A Python Condition Statement is a code block that is determined by the execution result (True or False) of one or more statements. You can briefly understand the execution process of conditional statements: If statement In Python, the if statement is generally in the following format: if condition_1: statement_block_1elif condition_2: stateme

"useremail" Open GitHub's repository, copy the SSH link to the Clipboard, and enter the following command:1 CD "Yourfolder" 2 git clone "xxxxxxxxxx" # Copied link 3 cd "Yourreponame" 4 # Create with Echo or touch 5 # Then add these new files 6 git add "newfilename" 7 # Delete file 8 git rm "Somefile" 9 # Restore the file11 git reset-- # commit after change14 git commit-m "Your activity/change description" # use M when commit for the first time 15 # then push,

blogger himself in learning machine learning process, see the related books use Python version is different, but want to each version can know how to use, next, bloggers to introduce a more simple and convenient way: First: Install the Python environment, highly recommended to use Anaconda,anaconda is a python release, if Python is compared to Linux, then Anancoda is CentOS or Ubuntu. The first step. Installation Anaconda 3 (Note: first install ANACONDA2 or 3 version can, no problem), download

1. Download \ install \ Configuration 1. python3 First, we need to download Python3. The latest version is python3.2, which is Http://www.bkjia.com/down/html/46818.html The installation process is not required. It is installed in the C: \ Python32 directory by default. After installation, add the installation directory C: \ Python32 to the environment variable. Open the Command Prompt window and enter pytho