Python

1. Constant naming rulesIn Python, the variable name indicates that a variable is a constant, usually in the form of a full capitalization, such as:' 127.0.0.1 ' '3306'2. Python compilationPython first compiles the source file (. py) into a

1, vi uzip (file name)2. Copy the following Python program1 #!/usr/bin/env python2 #-*-coding:utf-8-*-3 #uzip.py4 5 ImportOS6 ImportSYS7 ImportZipFile8 9 Print "processing File"+ sys.argv[1]Ten OneFile=zipfile. ZipFile (Sys.argv[1],"R"); A

1. Underline _ represents the value of the last expression. Note: Only useful in the interpreter, showing the results of the previous operation.　　2. The print statement can be formatted with%, similar to C. such as: >>> print '%s is number%d! '%

First, the default parameters:The default parameters can simplify the invocation of functions, and when setting default parameters, there are a few things to note:1, the required parameter before, the default parameter is behind, otherwise the

1. There is no concept of constants in Python, such as Pi. Typically, the variable name capitalization defaults to constant, but it can still be changed.2. Python 3.x or later versions of. pyc files are moved to the __pycache__ folder. A program

1. About the Python program execution principle:?? Create a new Python file named auth.py, and then invoke the file from another Python file.Python Run Process:Python first compiles the code (. py file) into a bytecode-pyc file that can be read by

Recently saw an example of a decorator, not read,#!/usr/bin/pythonclassDecorator (object):def __init__(self,f):Print "Initial Decorator"f ()def __call__(self):Print "Call Decorator"@decoratordefFun ():Print " in the fun"Print " After"Fun ()See the

Each statement in the program ends with a newline character you can use the continuation character (\) backslash to divide the long statement into linesWather_is_hot = 1; Watherer = 0; if (Wather_is_hot ==1) and (watherer==0): Print ("The water in

Implementation method One: Use Pyhon's OS module with Os.listdir (); Os.pah.isfile (); Os.path.isdir (); Os.path.join () Methods for manipulating files and directoriesIdeas:From the top down, layers of search, each iteration to determine the

In python, the output of the dictionary is the same as in JSON format, but the dictionary format is a dictionary, and the JSON format is a string, so it is used when transmitting (especially web pages). Important Functions encode : Put a

#!/usr/bin/env python#-*-coding:utf-8-*-"""@desc: Delete Mail We add more test scenarios, such as: delete mail, find mail, send mail, etc."""ImportUnitTestImportOSImportSYS fromSeleniumImportWebdrivercur_dir=os.getcwd () sys.path.append

#!/usr/bin/env python#-*-coding:utf-8-*-"""@desc: Customizing your browser"""ImportUnitTestImportOSImport Time fromSeleniumImportWebdriverclassTestconfigfirefox (unittest. TestCase):defsetUp (self): FP=Webdriver. Firefoxprofile ()#enter About:config

First, prefaceThere is a small harvest to do this problem, about Digital root solution, there is a very convenient small formula: Second, the title 258 Add DigitsGiven a non-negative integer num , repeatedly add all its digits until

Objective:As a serious fanatic of deep learning, after studying various theories, he has been trying to learn the framework of deep learning through project practiced hand and the knowledge of structure used in actual combat. The wish is good, but

First, prefaceHave done two questions to slowly get the leetcode operation.Ii. Title 349 intersection of two ArraysGiven the arrays, write a function to compute their intersection.classsolution (object):defintersection (self, nums1, NUMS2):""": Type

First, prefaceFor this kind of abstract problem there is self usage, but also more practice, this question is to refer to other answers to do.Second, title 104 Maximum Depth of binary TreeGiven a binary tree, find its maximum depth.The maximum depth

The cognition and application of stringCognition 1: The concept of a stringWhat is cognitive 2:acii Unicode UTF8?Python default file encoding is ASCII1. Len's Considerations (decode () need testing)>>> len ("Analysis")4>>> Len (U "Analysis")22.

Python provides a summary of file operations, Open a file Operation File 1. When opening a file, you must specify the file path and opening method. Open Mode: R: Read-OnlyW: Write onlyA: append "+" Indicates that a file can be read and written

Build a python Development Environment graphic tutorial (install Python, pip, Interpreter) under Win7 ), Install Python 1. Download Python suitable for the System Version First visit web site (http://www.python.org/getit/) download for your own

New Tax calculator Python script and calculator python scriptNew Tax calculator Python script New Tax calculator (Python): a beginner script that is extremely simple and does not handle troubleshooting. It is sent only for you to enrich your