Python

Use of the Hashlib module:#Coding=utf-8"""hashlib Module"""ImportUnitTestImportHashlibImportChardetclassTesthashlib (unittest. TestCase):deftest_md5 (self):"""MD5 Encoding"""str1="Chinese str"MD5=hashlib.md5 () md5.update (Str1.encode ('Utf-8')) Res=

Learn and test collections related methods:#Coding=utf-8"""testcollections.py Practice and test the Collections collection Module"""ImportCollectionsImportUnitTestclasstestcollections (unittest. TestCase):deftest_namedtuple (self):"""Namedtuple is a

Everyone good noon, because the new year has not returned to the state, for a long time did not share a wave of small knowledge, today, continue to share a wave of Python parsing log small script.First of all, the same first look at the log is a

# Coding=utf-8 Import Urllib.request Import re url = ' http://www.163.com ' File = ' d:/test.html ' data = Urllib.request.urlopen (URL). Read () R1 = re.compile (' ') c_t = R1.findall (data) Print (c_t)

1 #Shopping mall2 #product display, price3 #buy items, add to cart, always add4 #payment, you have 4000 yuan, not enough money, on the withdrawal of orders. 5 6Items = {'CPU':' -','Motherboard':' -','Chassis':' -','video card':' -','keyboard':'

Requirements:1. Enter the user name, password2. Display welcome message after successful authentication3. Input error 3 times after being lockedFlow chart:The password_file format for creating the password file is as follows:ADO 123AAA 234BBB 456The

Preface Defining functions in Python can be done with required parameters, default parameters, variable parameters, and keyword parameters, all of which can be used together, or only some of them, but note that the order of the parameters

Preface: This article shows you how to create a simple alarm with Python, it can run at the command line terminal, it takes minutes as a command line parameter, after this minute will print "wake-up" message, and the bell Alarm, you can use 0

(1) Position parameters, the parameter is passed in by position when the function is called (2) The default parameter , that is, when the function definition gives the value of the parameter, set the default parameters to pay attention to two

Preface Wrote these scripts have a common, are related to the web, always use to get links to some of the methods, accumulated a lot of crawler capture experience, in this summary, then do things will not have to repeat the work. 1. The most basic

I. Introduction of IPython IPython is an interactive Python interpreter, and it's more efficient. Unlike most traditional working modes (compile-and-run), it uses a working pattern: execute-and- explore , and most of the data-analysis-related

In web development, we often encounter web crawling and analysis, all kinds of languages can do this function. I like to use Python, because Python provides a lot of mature modules, it is easy to implement web crawling. But in the crawl process

The Linux terminal is wonderfully infinite, and many excellent software are born inside the terminal. By contrast, the idea of Windows itself is inconsistent with Linux, so you know it. Now, let's think about how to display a picture in the

Preface To do this, you need to pause the program, wait and catch a keyboard input from the user, and then continue. Python has built-in libraries to help us with this functionality, but we want to differentiate between Windows and Linux. msvcrt

Data extraction is a frequent requirement in the daily work of analysts. such as a user's loan amount, the total interest income for a particular month or quarter, the amount of loans and the number of pens for a specific period of time, the number

In the case of high business stability requirements, operations to be able to detect problems in a timely manner, sometimes need to do real-time analysis of the application log, when a condition is met immediately alarm, rather than passively wait

DB2 is a relational database management system developed by IBM in the United States, and its main operating environment is UNIX (including IBM's own Aix), Linux, IBM i (formerly known as os/400), z/OS, and the Windows Server version. Today we'll

Recently spent some time learning python, and wrote a multi-threaded crawler to get the movie heaven on the resources of the Thunder download address, the code has been uploaded to GitHub, the students need to download their own. Just start learning

Share this article today, the text is not much, code-based. Absolute dry, fair trade, mainly shares the 20 tips for improving Python performance and teaches you how to bid farewell to slow python. Original author Kaiyuan, full stack programmer,

Python object-oriented There are many special methods, such as __init__ (construction method), __del__ (destructor method), These methods are very important for object-oriented programming, the following is a list of some common special methods(1) __