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66 Interesting Python Trivia

1. Inline comments

   • You can use it at the end of the code line # Make inline comments, such asx = 10 # 这是一个内联注释。

2. Multi-line comments

   • Multi-line comments can be enclosed in three quotes. ''' or""" pack.

3. Fraction

   • fractions The module provides a fraction type that can accurately represent fractional values.

4. Decimal

   • decimal The module provides a decimal type that can perform precise floating-point operations.

5. Built-in help

   • help() Function can be used to get help information for an object.

6. Documentation Strings

   • Functions, classes, and modules can contain documentation strings (docstrings), using """ pack.

7. Unused variables

   • Common _ As a placeholder for unused variables.

8. The context manager protocol

   • accomplish __enter__ and__exit__ Objects whose methods can be used in context managers.

9. Object __str__ method

   • __str__ A string representation of a method definition object, used forprint() andstr()。

10. Object __repr__ method

    • __repr__ The official string representation of a method definition object, used for debugging and logging.

11. String join method

    • use str.join() Method can efficiently concatenate a list of strings.

12. Set Operations

    • Python sets support union |, intersection
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