Python crawlers need to learn the basics of Python development, Python advanced programming and database development, front-end development, and WEB framework development.
Noun introduction:
Python was designed by Guido van Rossum of the Netherlands National Center for Mathematics and Computer Science in the early 1990s as an alternative to a language called ABC. Taste. Python provides efficient high-level data structures and enables simple and effective object-oriented programming. Python syntax and dynamic typing, as well as the nature of an interpreted language, make it a programming language for scripting and rapid application development on most platforms.
With the continuous updates of the version and the addition of new language features, it is gradually being used for the development of independent and large-scale projects. Python is more suitable for novices to learn among various programming languages. The Python interpreter is easy to extend and can be extended with new functions and data types using C, C or other languages ??that can be called through C. Python can also be used as an extension programming language in customizable software.
Development history:
Since the birth of the Python language in the early 1990s, it has gradually been widely used in the processing of system management tasks and Web programming. In 1995, Guido van Rossum continued his work on Python at the Corporation for National Research Innovation (CNRI) in Virginia, where he released several versions of the software.
Basic syntax:
One of the design goals of Python is to make the code highly readable. It is designed to use punctuation marks and English words commonly used in other languages ??as much as possible to make the code look neat and beautiful. It does not require repeated declaration statements like other static languages ??such as C and Pascal, nor does it have special situations and surprises like their syntax.
Python developers intentionally prevent programs that violate indentation rules from being compiled to force programmers to develop good programming habits. And the Python language uses indentation to indicate the beginning and exit of statement blocks instead of using curly braces or certain keywords. Increasing indentation indicates the beginning of a statement block, while decreasing indentation indicates the exit of a statement block. Indentation becomes part of the syntax.