Python

One: What is the socket big packet sending problemOn the socket server side or when the client sends more data to the other party than the recipient accepts, a second acceptance is received with the result of the last command sent. This is the first

Monitoring Nginx Log, if someone attacks, then blacklist, the following steps:1. Read the log file2. Separating files, removing IP3. Place the removed IP into the list and then interpret the number of IP4. If the set number of times is exceeded, the

What do you mean "multitasking"? To put it simply, the operating system can run multiple tasks at the same time. For example, while you're surfing the Internet with your browser and listening to MP3, while you're working with Word, that's

Mac comes with python2.x version, sometimes need to use python3.x version for development, but can not delete python2.x, may cause system instability, then you need to install multiple versions of Python.1, install the python3.x version, I installed

In Python, there are many ways to implement the enumeration function, which can be realized by using the data structure of the dictionary and the corresponding relationship between the key and the value.my_enum={'red': 1,'yellow': 2, ' Blue ':

Regular functionsPython provides re modules that contain all the functions of regular expressionsBecause the Python string itself has \ escaped, you need to be aware of:s = "abc\\-001"The corresponding regular expression should be: ' abc\-001 'With

# user_dic={' xiaohong ': ' 123 ', ' Xiaobai ': ' 123 ', ' Xiaohei ': ' 123 '} # With open (' Idpd.txt ', ' W ', encoding= ' utf-8 ') as F: # f.write (str (user_dic))# with open (' Idpd.txt ', ' R ', encoding= ' Utf-8 ') as F2:#

letter                    ->             ladderscore0                     ->       LadderScore1                    ->        LadderScore2                    ->       LadderScore3                    ->        LadderScore4          

What is a regular expression?A regular expression is a small, highly specialized, language that is used primarily for string processingRegular expressions are a common language, implemented in Python via the RE module, and the import reTools:

Python crawler BeautifulSoup Recursive fetch instance Summary: The main purpose of crawler is to crawl along the network needs of the content. The essence of them is a recursive process. They first need to get the content of the page, then analyze

The so-called deferred computation of a class property is defined as a property of the class, which is evaluated only at the time of access, and once accessed, the result is cached and not calculated every time. The main purpose of constructing a

Closures in Python, the function is also an object. Therefore, when defining a function, we can then nest the definition of a function and return the nested function, for example: from math import powdef make_pow (n): def inner_func (x): # nesting

Paste a data cleaning when the code to write, do the data processing, the original file in the process of processing needs to be converted to a certain format, raw file data: 123.txt1,3,42,3,51,2,3,52,5 using Python to convert to a two-dimensional

This article mainly introduces Python using QRCode module to generate two-dimensional code examples of the relevant information, the need for friends can refer to the following Python generates two-dimensional code using the QRCode module QRCode

This article mainly introduces Python using QRCode module to generate two-dimensional code examples of the relevant information, the need for friends can refer to the following Python generates two-dimensional code using the QRCode module QRCode

The following small series for everyone to bring a cliché Python duck class and polymorphic. Small series feel very good, now share to everyone, also for everyone to make a reference. Let's take a look at it with a little knitting. First, what is

Class View,  Class View Usage principles The less code the better Never repeat the code View should only contain the presentation logic, not the business logic Keep view logic clear and simple Do not use CBVs as the 403,404,500 error handler

Virtualenv environment replication, virtualenv Environment In Python development, virtualenv is usually used for Environment isolation to prevent contamination of the local Python environment. When we have multiple virtual environments, how can we

Pycharm Chinese garbled problem summary, Preface: I just started to learn python these days and installed pycharm. But the Chinese Garbled text is really annoying. I 've been searching for it online for a long time and I 've been confused about it.

Python development [module]: re regular, python Development reRe Module Preface: The re module is used to operate python regular expressions. '. 'By default, any character except \ n is matched. If flag DOTALL is specified, any character is matched,