Python

Recently in learning Python encountered a variety of problems, in the online search solution, while thinking of their own problems recorded, one to impress themselves, and then hope to help the same problem people I am a small white one, I hope

Reptiles are sometimes slow to crawl some Web pages, affecting performance. All can set timeout time.Timeout Unit secondsSet the timeout time to 0, using the Try statement. #coding: The utf-8 **urllib2** timeout can be set directly through the

Python log construction through configuration files logtest.py: #!/usr/bin/env Python #-*-coding:utf-8-*-import configparser Import time import random #随机构造num条日志 def getlograndom ( Type,num,typelog): if (type = = 1): Timer = Time.ctime () Sysip =

I like both of these ways: Write: Data_list=list ([First_day,second_day,third_day,forth_day,fifth_day]) path=os.getcwd () count=1 for Item in Data_list: fobj=open (path+ '/' +str (count) + '. txt ', ' W ') fobj.writelines (['%s%s '%

This function is the implementation of a tuple list from multiple sequences to return the iteration, that is, from each sequence to get an item, and then all the items generated tuples, and then the tuple generated list returned. If there are

Problem: Given a string, look for the longest repeating sequence, if the string is composed of a single character, such as "aaaaaaaaaaaaa" the output that satisfies the requirement is a Ideas: There are two ways that I can think of. (1) Traversing

Python Module (module) In the process of computer development, as the program code more write more, in a file, the code will be longer and more difficult to maintain. In order to write maintainable code, we grouped a number of functions into

1. Control logic Statements (1) If conditional statement If expr_1: statement elif expr_2: statement else: statement Note, the If statement can compose a ternary expression of Python: z = x if expr else yIndicates that if expr is true,

Some functions in Python's class are often of special significance. __init__ () and __call__ () are two special types of functions that are useful for class. __init__ () In Python, the meaning of the __init__ () function is equivalent to the

If multiple application URL statements are written in the URLs file in the project directory, this may cause the file to be wrong, and too much information to modify the change is not easy to find the corresponding application, in each application

Matplotlib is supported by Unicode encoding, the problem with figure 1 is that no suitable Chinese fonts are found, and there are two solutions: 1. Directly modify the configuration file Matplotlibrc I have not tried this method, because I installed

1.type () function. The type () function is simple enough to enter the variable directly into the Such as >>> a = ' 1314 ' >>> type (a) >>> b = 111.2 >>> Type (b) 2.isinstance () function The isinstance (x,y) brackets have two types: x= to

Ideas and algorithms can be the same, but the syntax is different AH. For example 1+2+3+4+ ..., and over 10000Shell,c,python to achieve similar ideas.1, the shell implementation while loop#!/bin/shSum=0I=0While [$sum-LT 10000];Todoi=$ (($i + 1));

This function is used to delete an object's properties, such as a property added in the function setattr (), which can be removed by using this function. The argument object is an object, and the parameter name is a string, but the string must be an

Web Server Portal: # _*_coding:utf-8_*_ from wsgiref.simple_server import make_server def runserver (environ, start_response): Start_res Ponse (' OK ', [(' Content-type ', ' text/html ')] url = environ[' Path_info '] _, home, temp = url.split ('/

I've long heard that virtualenv is one of the essential artifacts of Python, But always feel that the Mac python2.7 is very easy to use, as if there is no need for virtualenv, but today on the GitHub to see a new Python open source project, need to

P1494 Yang Hui's the number of even numbers in a triangle accepted Label: curimit [Display label] background Curimit has been in a particularly bad mood lately, especially seeing even numbers. Description One day, curimit in play, found a paper on

The definition of an object for a 1.python list elements = [' Heilongjiang ', ' Jilin ', ' Liaoning '] list (' Wahaha ') #输出 [w], ' A ', ' h ', ' A ', ' h ', ' a '] 2.pythonlist of Operation (1) Basic operation Lst[index] = value #对指定元素赋值

recalbumsp.py #coding =utf8 #---------------------------------------# Author: Ewang # Date: 2017-10-28 # language: Python 2.7 #------------------ ---------------------Import urllib2 Import re import urllib import sys reload (SYS)

Basic Ideas In order to find the right insertion point for the direct insertion sort, a method of finding a bit with a similar binary method is used. Python Implementation Def Binaryinsert (a): # binary Insertion sort: small-> large # using