Python

Today I took a look at some of the multiple threads download files that I just learned when I was a python.To achieve a simple multithreaded download, you need to focus on the following points:1. File size: Can be extracted from the reponse header,

Filter function: The filter () function filters the sequence by using a custom function that filters a sequence, passes each item of the sequence to a custom filter function, and returns the result to be filtered. Finally, the filtered results are

IPY module can help us to complete the IP calculation and planning. Now there are a lot of IP address computing Web sites, this module to achieve the function and they are similar. Installation First download the source code, address:

At present, many so-called internet companies have to engage in GPS positioning attendance clock, the current customer units also require all manufacturers to clock the GPS software. In addition to the company's fingerprint clocking out, but also to

First, make sure all encodings are Unicodesuch as Str.decode (' UTF8 ') #从utf8文本中U "Ah L" #在控制台输出中(wordy) would like to use a reference to a certain code HEX but the depressing is that each word seems to occupy 2 positions, using a regular match

Get file suffix name The code is as follows Copy Code #!/usr/bin/python Import OS Dict = {}For D, FD, FL in Os.walk ('/home/ahda/program/'):For F in FL:Sufix = Os.path.splitext (f) [1][1:]If Dict.has_key

Cases The code is as follows Copy Code filename = raw_input (' Enter your file name ') #输入要遍历读取的文件路径及文件名FILE = open (filename, ' R ')Done = 0While does not do:ALine = File.readline ()if (ALine!= '):Print ALine,ElseDone =

Suppose there is a dictionary in Python as follows: X={' a ': ' 1,2,3 ', ' B ': ' 2,3,4 '} Needs to be merged into: x={' C ': ' 1,2,3,4 '} Three things to do: 1. Convert a string to a list of values2. Merge two lists and add new key values3.

This article summarizes some simple basic output format form, the following words do not say more, to see the detailed introduction bar. A, print string >>> print "I ' m%s"% ("Jihite") I ' m jihite Second, print integer >>>

Objective Students who have used python to write object-oriented code may be familiar with __init__ methods that ，__init__ run immediately when an object in a class is created. This method can be used to do some of the initialization you want for

The way to implement regular in Python is through the RE (regular expression abbreviation) module, you can invoke the various methods of the RE module to implement different functions, so let's say, in Python, we can call those methods through the

What is a lambda expression Lambda expression (lambda expression) is an anonymous function that is based on the lambda calculus in mathematics, directly corresponding to the lambda abstraction (lambda abstraction), an anonymous function, A function

In Python, there are three processing libraries for time, dates, and calendar, in which DateTime has datetime.date, Datetime.time, and datetime.datetime three classes. Time can be divided into time stamp, local time and UTC time (World Standard Time)

Objective This article is mainly about how Python uses the zip function to traverse multiple iterators at the same time, and the version in the text is the Python3,zip function, which is a built-in Python function. The following words do not say

A static method is a method that uses the @staticmethod decoration, and the parameter table does not require the self or the CLS to access the class member variableThe default method is self, a member method, access to private variables and methods (

1. Install Pipmkdir ~/vi ~/.pip/pip.conf[global]trusted-host=mirrors.aliyun.comindex -url=http://https://bootstrap.pypa.io/get-pip.pysudo python get---9.0. 1 from/usr/local/lib/python2. 7 2.7)2. Install the Machine learning PackageThe following

Match number correlation‘.‘ Default match any character except \ n, if flag Dotall is specified, matches any character, including line breakThe ' ^ ' matches the beginning of the character, and if you specify the flags MULTILINE, this can also be

Why do you specialize in opening a pit to use pb. A final reason to give up on a JSON that is well-supported on each platform is to make it lighter, faster, and simpler in the case of a strong type and cross-platform. Since this is the goal to go,

Mongodb is used in my project. pymongo is also used. However, it is similar to this method in large functions. The code is as follows: Copy code Import dbDef test ():...Db. test. find_one (

Python design modeThree types:1. Creation type* Flexible object creation *-Abstract factory-Builder-Factory method-Prototype-Singleton2. Structural* Convert one object to another, or combine small objects into large objects