Python

URLLIB3 is a powerful, well-organized Python library for HTTP clients, and many Python native systems have started using URLLIB3. URLLIB3 provides a number of important features that are not available in the Python standard library:1. Thread Safety2.

Python data type Python provides 6 standard data types by default:1. Number类型 数值类型2. String类型 字符串类型3. List类型 列表类型4. Tuple类型 元组类型5. Dict类型 字典类型6. Set类型 集合类型1. Number type numeric

Code:#Coding:utf-8#Author: Xubling#L = [6, 3, 2, 32, 5, 4]defSelect_sort (L): forIinchRange (0,len (L)): forJinchRange (I,len (L)):ifL[i] > L[j]:#form of the Daleitai #temp = l[i] #L[i] = l[j] #L[j] =

#  Iteration #  If given a list or tuple, we can traverse the list or tuple through a for loop, which we call an iteration (iteration) #  in Python, the iteration is through the for  ... in, and in many languages such as C or Java, the iteration

Tag: Eve process body resolved to open the return character. comFirst, the use of logging moduleModule for easy logging and thread-safeCRITICAL = 50FATAL = CRITICALERROR = 40WARNING = 30WARN = WARNINGINFO = 20DEBUG = 10NOTSET = 0Simple to

Code:#Coding:utf-8#Author: Xubling#swap sort. Bubble sortL = [1, 3, 2, 32, 5, 4]defBubble_sort (L): forIinchRange (len (L)): forJinchRange (i+1, Len (L)):ifL[i]>L[j]:#temp = l[j] #L[j] = l[i] #L[i] = tempL[i], l[j] =

When the index of a list or a tuple does not reach our goal, we think of another sequence, the dictionary.CreateA dictionary consists of key-value pairs consisting of multiple keys and corresponding values.Key is unique. Value can not be

A. Module1. Definition: Contains the Python definition and the declaration file, the file name is the module name plus the. py suffix.Import loaded modules are divided into four categories:Code written in 1.Python (. py file)2. C or C + + extensions

I. INPUT and OUTPUTHow does python receive user input, use the input function, use Raw_input in Python2, receive a string, output, the first program has been written using print, code into the following:1 name=input (' Please enter your name: ')

A Python for loop can traverse any sequence of items, such as a list or a string.Grammar:The syntax format for the For loop is as follows:For in sequence: statements(s) # !/usr/bin/env python # -*-coding:utf-8-*- for in range (1,100):

#  named keyword parameter #  for keyword arguments, the caller of the function can pass in any unrestricted keyword argument #  as to exactly what is passed in, it is necessary to check the inside of the function through the KW #  still take the

One, an iterative#iterable an iterative#str#列表#tuple#set#dict#可迭代的--The corresponding Mark __iter__# print (' __iter__ ' in dir ([+)]) #判断一个变量是不是一个可迭代的Iterative conversion to iterator method1 #!/usr/bin/env python2 #*_*_cod:utf-8_*_3 4 #Convert an

After MongoDB 3.2, the default is to use the Wiretiger engineTo change the storage engine at startup:Mongod--storageengine Mmapv1--dbpath d:\data\dbThis will solve the problem that Mongvue cannot view the document!Project Process (steps):Go to

Producer-Consumer modelis a classic case of multithreaded synchronization.In this model, the producers push data to the buffer, eliminatingPull data from the buffer.The buffer in this Demo is done with a python-implemented Queue, which is

The Python operator is associated with an expression 1. Operator classificationThe operators are divided into 5 main types:1. 算术运算符 2. 比较运算符3. 位运算符4. 逻辑运算符 5. 成员运算符 6. 身份运算符7. 赋值运算符1. Arithmetic operators算术运算符 描述 实例

process-oriented programmingThe core is the process of the word, the process is to solve the problem steps, based on the process to design the program is like the design of an industrial assembly line, is a mechanical way of thinkingAdvantages: The

First, what is anonymous functionAnonymous functions as the name implies, it does not have the function name that can be used to invoke, like a normal function, and the definition of an anonymous function is concise with a lambda as the definition

ListTable name = ["Name1", "name2"]Print (Names[1:3]) #切片The starting position includes, and the end position is not included. will take 1 and 2, without taking 3names =

Python Seaborn Drawing[Email protected] 2017.08.02There are too many ways to draw, I do not know what the situation with the good?These things are seaborn used to draw according to the loaded data, matplotlib can also drawImport Seaborn as

This article mainly describes the Python programming implementation of the image recognition function, involving the Python PIL module installation and use of skills, the need for friends can refer to the following This paper describes the image