Python Level three Menu

Demand:Write level Three menu     1. menu requirements:         level menu:              Beijing                                      Shanxi          level two menu:      Chaoyang                  Changping                 Changzhi             

Python's requests module

When using Python for interface testing, you can use the requests module, which is based on the Urllib, using the Apache2 Licensed Open Source Protocol HTTP LibraryInstalling Requests is a modulePIP Install requestsUse of the Requests moduleRequests

First knowledge of Python

First, the introduction of Python1. First Python programEnter print (' Hello,world ')2. File header  #!/usr/bin/env python  # -*- coding: utf-8 -*-  3. Comment Line Comment: #注释内容 more comments: "' note content ' ' 4. If you import other. py files

Python deployment of Virtual environments--virtualenv

Virtualenv is a tool to create isolated Python environments. Virtualenv is a tool for creating a standalone Python development environment that addresses the dependencies, versions, and indirect permissions of different Python projects on the

Python 3.5 Django Notes

Django Getting Started notesEnvironment:Pycharm pro5.0.3python3.5After installing the above two softwarePython needs to add environment variablesOtherwise, running in CMD will cause an error.My computer is using WIN10.environment variable in path

In a multi-module Python project, how do I refer to the project's root directory in a submodule?

Reference: Http://codereview.stackexchange.com/questions/20428/accessing-the-contents-of-a-projects-root-directory-in-pythonSometimes it is necessary to develop a slightly larger Python project that requires multiple modules and multi-level catalogs.

python-setting Log

#-*-coding:utf-8-*-__author__ = ' 007 ' __date__ = ' 2016/6/16 ' import loggingimport ctypes#std_input_handle = -10STD_OUTPU t_handle= -11#std_error_handle = -12foreground_white = 0x0007foreground_blue = 0x01 # text color contains BLUE.

Getting Started with Python

What kinds of programming languages are there?One: Machine language: Machine language is a collection of machine instructions that can be directly identified and executed by a computer using binary code.Advantages: Flexible, direct execution and

Python's Static and class methods for object-3 classes

Or with the last washing machine example:1 classWasher:2company='ZBL'3 def __init__(self,water=10,scour=2):4Self._water=water#do not want users to directly access instance variables, can be marked as private5Self.scour=Scour6self.year=2000#This

The role of __all__ in Python

1. test file foo.py#-*-coding:utf-8-*-# import sys# reload (SYS) # sys.setdefaultencoding (' GBK ') __all__ = [' Bar ', ' baz ']waz = 5bar = 10def Baz (): Return ' Baz '2. Introduce the file, create the run-foo.py#-*-coding:utf-8-*-# import sys#

Python Basics: JSON file Save and read

One, save the data as a. json file1 # Data 2 with open ("./hmm.json",'w', encoding=' utf-8') as Json_file:3 json.dump (model,json_file,ensure_ ascii=False)4 Second, read the. json file1 # storing the Read data 2 with open ("./hmm.json",'r'

Python uses zip to merge adjacent list items

1 >>> a = [1, 2, 3, 4, 5, 6]2 >>> Zip (* ([ITER (a)] * 2))3 [( 1, 2), (3, 4), (5, 6)]function form:1 Lambda A, k:zip (* ([ITER (a)] * k))2 >>> group_adjacent (A, 3)3 [(1 , 2, 3), (4, 5, 6)]4 >>> group_adjacent (A, 2)5 [(1, 2), (3, 4), (5, 6)]6 >>>

Python Learning Diary Sixth--shades copy

Depth copy:1, strings and numbersImport copy# Shallow copy copy.copy () #深拷贝copy. Deepcopy () ################################################################## ################### #a1 = "string" #a1 = 11A2 = A1A3 = copy.copy (a1) a4 = copy.deepcopy

Python-demo instances

1.turtle Library and Python caseImport Turtledef Drawsnake (Rad,angle,len,neckrad): For I in range (len): turtle.circle (Rad,angle) Turtle.circle (-rad,angle) turtle.circle (RAD,ANGLE/2) turtle.fd (RAD) Turtle.circle

Python Selenium element Operation keyboard operation (v)

The previous section describes the operation of the analog mouse on the elements, this section mainly introduces the operation of the keyboard elements, the actual process of the mouse to the elements of the operation of the element more often than

Deadlock problem caused by "Python" multithreaded queue

A multi-threaded Python script was written, and the result was a deadlock. Debugging for a whole day to find out why I used the queue error caused.To illustrate the problem, here is a simplified version of the code. Note that this code is wrong and

Escaping problems in "Python" regular expressions

Encode (' string-escape ') solutionFor example, to match the content of ' \x ' in ' \x0e\x0a ', where you want to put ' \x0e ' as a string, then the \ should be escaped.Non-escaped regex:p = ' (? Write this directly will be error, need to give \

Installation of PIP in multiple versions of Python and corresponding package installation

Recently it took a long time to do this, because Deepin under python has two versions, and none of the pipis installed, the previous blog post is installed by default Pip Give python2.7 , the result of various problems, here will be the detour

Urlerror exception handling for the Python crawler

This article mainly introduces the Python crawler urlerror exception handling, in detail to explore the Url\http exception processing related content, through a number of specific examples to analyze, very simple, but very practical, interested in

Scrapy tutorial-Douban movie image crawling, scrapy Douban

Scrapy tutorial-Douban movie image crawling, scrapy DoubanI. Get the results first   Ii. install and use Scrapy Official Website: https://scrapy.org /. Installation command: pip install Scrapy After installation is complete, use the default template

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