1. print() print function , print("abc",end=" ") does not wrap
2. The *n number connection is the multiplication operation, and the string is the number of operations is n
3. input() receives user input
4 , if-elif-else branch structure
5. dir(__builtins__) view BIF, help(BIF) view BIF help
6 , \ escape character
7. str = r'c:\now' gets the original string, you can also do it without escaping
8. Triple-quoted string str='''abc
fjas
ljfkla
'''
print(str)==" will output in the above format
9 , while loop
10. The random module == "import random ==" randint(1,10) generates a random number of [1,10), the header does not include the tail
11. Scientific notation (e notation)
12、True == 1,False == 0
13, int() / float() / str() type conversion to each other
14. type() to get type information
15. Whether the comparison type of isinstance() is the same, for example: the return value of isinstance('abc', str) is True
16. Operation operator: + - * / % ** //
17. Logical operators: not / and / or
18. Comparison operator: < <= > >= == !=
19. Priority (16-18): exponentiation - sign (unary operator) - arithmetic operator - comparison operator - logical operator (not - and - or)