Python

The directory organization is as follows:The Dbutil code is as follows:#!/usr/bin/python#-*-coding:utf-8-*-ImportConfigparserImportPymysqlclassDbutil:#dbsection as a section in a configuration file def __init__(self,dbsection):

Requirements Description:The centos7.2 system has its own python2.7 version on the development machine, but the development project uses the python3.5 version, in order to ensure the normal operation of the CentOS system, and save the machine

Matplotlib, official website: http://matplotlib.sourceforge.net/,Matplotlib is a Python module developed by John Hunter to draw two-dimensional graphics. It takes advantage of Python's numerical calculation module Numeric and Numarray, cloning many

PageRank Program:File contents:Page1 Page3Page2 Page1Page4 Page1Page3 Page1Page4 Page2Page3 Page4def computecontribs (Neighbors,rank):For neighbor in Neighbors:yield (neighbor, Rank/len (neighbors))Links = sc.textfile ("Tst001.txt"). Map (Lambda

Although Python has a lot of advanced modules, but also comes with a battery programming language, but to be a qualified programmer, the basic algorithm still need to master, this article mainly introduces some sort of list algorithmRecursion is a

6.1 Decorators6.2 Generators6.3 ModulesTimeRandom6.1 DecoratorsClosed PackageDefinition: If a reference is made to a variable that is in an external scope (but not a global scope) in an intrinsic function, then the intrinsic function is considered a

First, Python introduction 1.1, the production of PythonThe founder of Python is Guido van Rossum. During the Christmas of 1989, in Amsterdam, Guido was determined to develop a new script interpreter as an inheritance of the ABC language in order to

Before, we all said that Python is the future of the OPS engineer; Now, why does everyone say that Python's ops will be unemployed? Operation and maintenance must understand the development, especially the development of Python, has formed a

Mac python2.7 cannot be removed, because many system modules rely on, so we use pyenv to install the python3.6 version, so that can coexist.1. Install OS X's Suite manager (like Ubuntu Apt-get),The website is as follows:

Import loggingImport timeImport TracebackFrom selenium import Webdriverdef log (Test_case_func):def wraps (*args, **keywords):Log_name= time.strftime ("%y%m%d%h%m%s", Time.localtime ()) +test_case_func.__name__Logging.basicconfig (level=logging.info,

Transferred from: http://zhpfbk.blog.51cto.com/4757027/1561926Includes common operating system features in Python's standard library OS moduleThe OS module introduces the following method: Import OSThe following are common usage methods for OS

Hashlib Python's hashlib provides a common digest algorithm, such as MD5,SHA1 and so on.What is a digest algorithm? Abstract the algorithm is also called hash algorithm and hashing algorithm. It uses a function to convert any length of data

Transfer from http://www.infocool.net/kb/Python/201611/209696.html# original address first step, prepareFrom train_faster_rcnn_alt_opt.py into: Initialization parameters: args = Parse_args () using Python's ArgparseThere are –net_name,–gpu,–

This article mainly introduced the PYTHON3 use the requests module to crawl the page content the actual combat drill, has the certain reference value, has the interest can understand 1. Install Pip My personal desktop system with the LinuxMint, the

Implement binary heap and heap sorting in python, and python heap sorting Implement binary heap and heap sorting in python Heap is a special tree structure. The data storage in the heap meets certain heap sequence. Heap sorting is a kind of sorting.

Python implements the intersection of two csv files, This example describes how to use Python to calculate the intersection of two csv files. We will share this with you for your reference. The details are as follows: #! /Usr/bin/env pythonrd3 =

Basic Python learning: Common built-in functions, basic python Functions Preface Python provides many built-in functions for various types. These built-in functions are used to perform similar operations on multiple types of objects, that is to say,

Python three-level menu instance, Requirements: Print province, city, and county menus Can return to the upper-level Exit the program at any time Version 1 # _ Author: Ahern Li # @ _ date: menu = {'zhejiang province ': {'hangzhou City': {'yuhang

Python difflib module example, pythondifflib The classes and methods provided by the difflib module are used for differential comparison of sequences. They can compare files and generate differentiated comparison pages for different result texts or

Python reload (module) usage example details, pythonreload Preface This article mainly introduces the reload (module) usage in python and shares it for your reference. I will not talk about it much below. Let's take a look at the detailed