Python

The public number 100 days, is a worthy mention of the day! I've been doing this public number since October 31, 2017, and it's almost 100 days from today's February 7, 2018. Although the public has applied early, it was not until October 31 last

1. What is an iteration:For a given list or tuple, traverse the list or tuple through a for loop, which we call iteration (iteration).use the for...in statement in 2.python to complete the iteration statement:(1) Iteration list:When iterating

---restore content starts---Iterator Generator iterator: 1, what is an iterator protocol①dir (measured object) if it contains __iter__, then this object is called an iterative object and follows an iterative protocol.② Iterate objects:iterable can

ProblemYou need to check the beginning or end of the string with the specified text pattern, such as the filename suffix, urlscheme, and so on.Solution Solutions1. An easy way to check the beginning or end of a string is to use the Str.startswith ()

Web FrameworkAll Web applications are essentially a socket server, and the user's browser is actually a socKet client.Import socketdef handle_request (client): buf = Client.recv (1024x768) client.send ("http/1.1-ok\r\n\r\n". Encode ("UTF8"))

1. AgreementHTTP, SMTP, DNS, FTP, SSH, SNMP, ICMP, DHCP .... and other specific self-examination2.OSI Seven FloorApplications, representations, sessions, transports, networks, data links, physical3.socket:Encapsulation of all upper-level

What does formatted output mean?The data is output according to some special requirementsIf you enter an integer, you want the integer to follow the hexadecimal, octal output, if you enter a decimal number, you want the decimal to retain the 2

Simple usage Demo#!/usr/bin/python#Coding:utf-8#basic usage of XlsxwriterImportXlsxwriter#1. Create an Excel fileWorkbook = Xlsxwriter. Workbook ('demo1.xlsx')#2. Create a worksheet sheet objectWorksheet =Workbook.add_worksheet ()#3. Set the first

1. Naming rules for variables Variable names can contain only letters, numbers, and underscores. Variable names can begin with a letter or underscore, but cannot begin with a number, for example, you can name a variable message_1, but you

Function name (first object)1. Memory address of function, print (func)def func (): Print (222) Print (func)2. Function names can be assigned to other variablesdef func (): Print (222= funcprint(f ())3. Function names can be used as elements

The Python operator precedence operator describesLambda Lambda expressionor boolean "or"and Boolean "and"Not x boolean "non"In,not in member TestIs,is not identity test,>=,!=,== comparison| Bitwise OR^ Bitwise XOR OR& Bitwise AND> shift+,-Addition

#coding: Utf-8 ' strategy mode:     is the use of multiple algorithms to solve a problem, the most important feature is the ability to transparently switch the algorithm at runtime (client-side code is not aware of change)       If there are two

Recently there are a lot of mass spectrometry data, but a lot of protein has been studied, in order to find and bait protein-related, but also the specific hypothetical protein, decided to write a Python program to filter out unwanted information,

1. Use of class variables:Common properties for everyone, save overhead (memory)2. DestructorsPerformed when an instance is released and destroyed, usually for some finishing touches, such as closing some database links and opening temporary files3.

Python programming scoketServer implements multi-thread synchronization of instance code, pythonscoketserver This article focuses on the Python programming scoketServer to implement multi-thread synchronization. The details are as follows. During

Summary of three methods for operating the MySQL database in Python: pythonmysql 1. Use of MySQLdb (1) What is MySQLdb? MySQLdb is an interface used by Python to connect to the MySQL database. It implements the Python database API Specification V2.0

Python tkinter event advanced usage instance, pythontkinter This example describes the advanced usage of Python tkinter events. We will share this with you for your reference. The details are as follows: Let's take a look at the running

Python and Django framework generate two-dimensional code method analysis, pythondjango framework This article describes how to generate a QR code using Python and Django framework. We will share this with you for your reference. The details are as

6.4. decorator and 6.4 decoratorDecorator: Meaning: Add new functions to functions without changing the source code of the original function or calling method of the original function in the entire project   Because the source code of the function

Data Structure basics of Python: python Data Structure I. Data Structure Basics A. What is data structure? B. Data Structure Classification C. List Import randomfrom timewrap import * def list_to_buckets (li, iteration): "": param li: List: param