Python

Today, when writing a crawler, found a strange thing, using the Str method to cast a BeautifulSoup object into a string error, the hint is "maximum recursion depth exceeded while calling a PythonObject ", meaning roughly" when the object is called

IntroducedPython-nmap is a port scanning tool based on the system Nmap command, which is simple and convenient to use.Recently, in order to enhance server security and supervision, it is necessary to keep the company server open port scan records

Recently, I read a book called "Fun Learning python--teach children to learn programming", which is very suitable for me who never write code.Today began to follow the book, learn to write the first game of life: Pinball.The code is just the

In short, the lambda expression mentioned in programming is usually used in situations where a function is required but does not bother to name a function , that is, the anonymous functionWhen we pass in a function, there are times when we don't

　　Cx_freeze is a tool used to encapsulate Python scripts as executable programs, supporting the latest version of Python3.2. The resulting execution file is cross-platform and runs without the need to install Python on the system. At present,

SELENIUM2 python automated testing using the AutoIt tool for local file uploadsI'm learning based onPythonlanguage ofselenium2During the automated test method, when a test involving a local upload file is found,selenium2when locating

I ran into a problem writing a program today about how to control floating-point numbers only show two digits after the decimal point, the normal idea is to use the round function, for exampleround(a, 2)，但是在面对下面的问题时候round就不太好用了 >>> a=13.9499999999999

DictPython built-in dictionary: dict support, Dict full name dictionary, in other languages also known as map, using key-value (Key-value) storage, with a very fast search speed.For example, suppose you want to find the corresponding score according

Reference article Python, how to initialize different variable types to null valuesCommon numbers, characters, are simple and not much explained.The list's value is in the form of [x, Y, z]The value of the dictionary dictionary is the form of {x:a,

Summary: market Research conducted by Packt Publishing, the world's largest programming-related book publisher, shows that JavaScript and Python are the most popular programming languages today, with Java prevalence 3rd. The company came to the

Multithread How to WriteThis is my first time to write multithread, so just follow the example, here is the example I used to learnFrom "Automate the boring stuff with Python" 15.6Importthreading, TimePrint "Start of the program" def takeanap():Time.

Reprint Address:Http://www.codeweblog.com/python%e6%a0%87%e5%87%86%e5%ba%93%e4%b8%8e%e7%ac%ac%e4%b8%89%e6%96%b9%e5%ba%93%e8%af %a6%e8%a7%a3/This article mainly describes the Python standard library and third-party libraries, the need for friends can

Data analysis and machine learning Big data is basically built on the ecosystem of Hadoop systems, in fact a Java environment. Many people like to use Python and r for data analysis, but this often corresponds to problems with small data or local

ASCII is a character set, including uppercase and lowercase letters, numbers, control characters, and so on, which is represented in a single byte, and the range is 0-127 Unicode is divided into UTF-8 and UTF-16.UTF-8 variable length, up to 6 bytes,

Python built-in functions (63) -- super, python built-in 63 super English document: super([Type[,Object-or-type]) Return a proxy object that delegates method callto a parent or sibling classType. This is useful for accessing inherited methods that

Change the OSS magnetic download site to python and the OSS magnetic download site to python. I haven't written a blog for more than a year and a half, so I don't know what to write. Oracle magnetic download-http://www.oshoh.com is now using

Python development [Article 1] string formatting Based on Python, Article 1 python String formatting There are two ways to format Python strings: percent and format. The percent sign method is relatively old, while the format method is relatively

Zabbix implements the alarm function and zabbix implements the alarm function. 1. Apply for an enterprise account, Application address https://qy.weixin.qq.com/ 2. log on to the enterprise account Figure 1 Figure 2 2. Add an account Figure

IO multi-channel model -- select, IO model -- select1. Trigger of IO multiplexing Model First, we will introduce the concept of "Trigger" in an I/O multi-channel model: 1 # There are two modes of horizontal triggering and edge triggering in linux

Python-ldap login case, python-ldap case 1 ldap_config = {2 'ldap _ path': 'ldap: // xx. xx. xx. xx: 389 ', 3'base _ dn': 'ou = users, dc = ledo, dc = com', 4'ldap _ user': 'uid = reporttest, ou = users, dc = ledo, dc = com ', 5 'ldap _ pass': '2017.