Identifier: The first character in the alphabet must be a letter or an underscore, and other parts are composed of letters, numbers and underscores. Identifiers are case sensitive. In Python3, you can use Chinese as variable names, and you can also use non-ASCII identifiers.

Numbers (Tuple) String (string) List (dictionary). Python supports four different number types: int (signed integer) long (long integer [which can also represent octal and hexadecimal ])float (complex).

The basic syntax element of Python language 1. Basic syntax elements of a program: format frame, indentation, comments, variables, naming, reserved words, data types, assignment statements and references. 2. Basic input and output functions: input (), eval () and print (). 3. The writing style of the source program.

After passing the exam, Python Level 2 is called National Computing Level 2 Python Language Programming, which is one of the National Computer Level 2 exams. After passing the exam, there will be a national second-class certificate. At present, the python certificate with high gold content is the internship certificate of Ali Python engineer.

Learn how to access network data, obtain and analyze network data, and explain the basic principles of reptiles. A local crawler project, using the most basic syntax, rather than using the crawler framework. 1 Python and Python Miscellaneous Notes Learn the excellent writing methods of extending Python and learn how to write high-quality Python-style code.