Python rookie tutorial learning 1: background learning

Quinn East 2020-11-15 16:54:41
python rookie tutorial learning background


https://www.runoob.com/python3/python3-intro.html

advantage

  •   Simple -- Python It's the language of simplicity . Read a good one Python The program feels like reading English , Although this English is very strict !Python This pseudo code nature of is one of its greatest advantages . It allows you to focus on solving problems rather than understanding the language itself .
  •   studies of the Book of Changes -- As you're about to see ,Python Extremely easy to use . That was mentioned before ,Python There's a very simple grammar .
  •   free 、 Open source -- Python yes FLOSS( free / Open source software ) One of . In short , You are free to distribute copies of this software 、 Read its source code 、 Make changes to it 、 Use part of it in new free software .FLOSS It is based on the concept of knowledge sharing by a group . Why is that Python One of the reasons for this excellence —— It's a group of people who want to see a better Python People who create and constantly improve .
  •   High level language -- When you use Python When programming in language , You don't have to think about the underlying details of how to manage the memory your program uses .
  •   Portability -- Because of its open source nature ,Python Has been ported to many platforms ( It has been modified to work on different platforms ). If you are careful not to use system dependent features , So all you have Python The program can run on any of the following platforms without modification . These platforms include Linux、Windows、FreeBSD、Macintosh、Solaris、OS/2、Amiga、AROS、AS/400、BeOS、OS/390、z/OS、Palm OS、QNX、VMS、Psion、Acom RISC OS、VxWorks、PlayStation、Sharp Zaurus、Windows CE And even PocketPC、Symbian as well as Google be based on Linux Developed Android platform !
  •   Explanatory -- This needs some explanation . A compiled language such as C or C++ Write the program from the source file ( namely C or C++ Language ) Switch to a language your computer uses ( Binary code , namely 0 and 1). This process passes the compiler and different tags 、 Options complete . When you run your program , Connect / The loader software copies your program from hard disk to memory and runs . and Python A program written in a language does not need to be compiled into binary code . You can run programs directly from source code . Inside the computer ,Python The interpreter converts the source code into an intermediate form called bytecode , It is then translated into the machine language used by the computer and run . in fact , Because you don't have to worry about how to compile a program , How to ensure that the connection reprints the correct library and so on , All this leads to the use of Python It's simpler . Because you just need to put your Python Copy the program to another computer , It's ready to work , It also makes your Python Programs are easier to port .
  •   object-oriented -- Python Supports both procedural and object-oriented programming . stay “ Process oriented ” The language of , Programs are built from procedures or functions that are simply reusable code . stay “ object-oriented ” The language of , Programs are built from objects that combine data and functionality . With other major languages such as C++ and Java comparison ,Python Implement object-oriented programming in a very powerful and simple way .
  •   Extensibility -- If you need a piece of your critical code to run faster or if you want some algorithms to be closed , You can use some of your programs C or C++ To write , And then in your Python They are used in programs .
  •   Rich library -- Python The library of standards is really big . It can help you with all kinds of work , Including regular expressions 、 Document generation 、 unit testing 、 Threads 、 database 、 Web browser 、CGI、FTP、 E-mail 、XML、XML-RPC、HTML、WAV file 、 Password system 、GUI( Graphical user interface )、Tk And other system related operations . remember , Once installed Python, All of these features are available . This is called the Python Of “ The function is all ready ” idea . In addition to the standard library , There are many other high-quality libraries , Such as wxPython、Twisted and Python Image library and so on .
  •   Standard code -- Python Forced indentation makes the code very readable .

shortcoming

  •   Running speed , If there is a speed requirement , use C++ Rewrite the key parts .
  •   The domestic market is smaller ( At home with Python To do the main development of , There are only a few web2.0 company ). But over time , At present, many domestic software companies , Especially game companies , He also began to use it on a large scale .
  •   Lack of Chinese materials ( well Python There are only a few Chinese materials , Now it should be more ). Thanks to the community , Several excellent textbooks have been translated , But there are many entry-level textbooks , Advanced content or only English version .
  •   Too many architectural choices ( Didn't like C# Such an official .net The architecture , There is no image. ruby Because of its short history , The relative concentration of architecture development .Ruby on Rails Architecture development small and medium web The program is invincible ). But it also shows from another side that ,python Better , Many talents are attracted , There are many projects .

Python The main areas of application are :

  •   Cloud computing : The hottest language of Cloud Computing , Typical applications OpenStack
  •  WEB Development : Many excellent WEB frame , Many large websites are Python Development 、YouTube、Dropbox、Douban…… Typical Web The framework includes Django
  •   Scientific computing and artificial intelligence : A typical library NumPy、SciPy、Matplotlib、Enided The library 、 Panda
  •   System operation and maintenance : Basic language of operation and maintenance personnel
  •   Finance : Quantitative trading 、 Financial analysis , In the field of financial engineering ,Python Not only is it used most , And the most used , Its importance has increased year by year .
  •   graphics GUI:PyQT,WXPython,TkInter

Python In some companies, there are :

  •   Google : Google App Engine , Code .Google.com、 Google Reptiles 、Google Advertising and other programs are being widely used Python.
  •  CIA: The CIA website uses Python Developed .
  •  NASA: NASA is widely used Python Data analysis and calculation .
  •  YouTube: The largest video website in the world YouTube Yes, it is Python Developed .
  •  Dropbox: The largest online cloud storage website in the United States , All use Python Realization , Daily treatment 10 Billion files uploaded and downloaded .
  •  Instagram: The largest photo sharing social networking site in the United States , Every day 3000 More than a million photos are shared , All of these are used Python Developed .
  •  Facebook: A large number of base libraries are available through Python Realized
  •  Red Hat/Centos: The most popular in the world Linux In the distribution Yum The package management tool is to use Python Developed
  •  Douban: Almost all companies do business through Python Developed .
  •   You know : China's largest Q&A Community , adopt Python Development ( Abroad Quora)

besides , And Sohu 、 jinshan 、 tencent 、 Grand 、 NetEase 、 Baidu 、 Ali 、 TaoBao 、 potatoes 、 Sina 、 Fruit shells and other companies are using Python To complete all kinds of tasks .

版权声明
本文为[Quinn East]所创,转载请带上原文链接,感谢

  1. 利用Python爬虫获取招聘网站职位信息
  2. Using Python crawler to obtain job information of recruitment website
  3. Several highly rated Python libraries arrow, jsonpath, psutil and tenacity are recommended
  4. Python装饰器
  5. Python实现LDAP认证
  6. Python decorator
  7. Implementing LDAP authentication with Python
  8. Vscode configures Python development environment!
  9. In Python, how dare you say you can't log module? ️
  10. 我收藏的有关Python的电子书和资料
  11. python 中 lambda的一些tips
  12. python中字典的一些tips
  13. python 用生成器生成斐波那契数列
  14. python脚本转pyc踩了个坑。。。
  15. My collection of e-books and materials about Python
  16. Some tips of lambda in Python
  17. Some tips of dictionary in Python
  18. Using Python generator to generate Fibonacci sequence
  19. The conversion of Python script to PyC stepped on a pit...
  20. Python游戏开发,pygame模块,Python实现扫雷小游戏
  21. Python game development, pyGame module, python implementation of minesweeping games
  22. Python实用工具,email模块,Python实现邮件远程控制自己电脑
  23. Python utility, email module, python realizes mail remote control of its own computer
  24. 毫无头绪的自学Python,你可能连门槛都摸不到!【最佳学习路线】
  25. Python读取二进制文件代码方法解析
  26. Python字典的实现原理
  27. Without a clue, you may not even touch the threshold【 Best learning route]
  28. Parsing method of Python reading binary file code
  29. Implementation principle of Python dictionary
  30. You must know the function of pandas to parse JSON data - JSON_ normalize()
  31. Python实用案例,私人定制,Python自动化生成爱豆专属2021日历
  32. Python practical case, private customization, python automatic generation of Adu exclusive 2021 calendar
  33. 《Python实例》震惊了,用Python这么简单实现了聊天系统的脏话,广告检测
  34. "Python instance" was shocked and realized the dirty words and advertisement detection of the chat system in Python
  35. Convolutional neural network processing sequence for Python deep learning
  36. Python data structure and algorithm (1) -- enum type enum
  37. 超全大厂算法岗百问百答(推荐系统/机器学习/深度学习/C++/Spark/python)
  38. 【Python进阶】你真的明白NumPy中的ndarray吗?
  39. All questions and answers for algorithm posts of super large factories (recommended system / machine learning / deep learning / C + + / spark / Python)
  40. [advanced Python] do you really understand ndarray in numpy?
  41. 【Python进阶】Python进阶专栏栏主自述:不忘初心,砥砺前行
  42. [advanced Python] Python advanced column main readme: never forget the original intention and forge ahead
  43. python垃圾回收和缓存管理
  44. java调用Python程序
  45. java调用Python程序
  46. Python常用函数有哪些?Python基础入门课程
  47. Python garbage collection and cache management
  48. Java calling Python program
  49. Java calling Python program
  50. What functions are commonly used in Python? Introduction to Python Basics
  51. Python basic knowledge
  52. Anaconda5.2 安装 Python 库(MySQLdb)的方法
  53. Python实现对脑电数据情绪分析
  54. Anaconda 5.2 method of installing Python Library (mysqldb)
  55. Python implements emotion analysis of EEG data
  56. Master some advanced usage of Python in 30 seconds, which makes others envy it
  57. python爬取百度图片并对图片做一系列处理
  58. Python crawls Baidu pictures and does a series of processing on them
  59. python链接mysql数据库
  60. Python link MySQL database