In Python, objects are passed by reference.
2. Multivariate assignment is actually tuple assignment
3. Write modules
Always remember a fact
5. Dynamic types
Qu-n227-435-450 = q-U-n227-435-450 = q-U-n227-435-450 = q-U-n227-435-450 = q-U-n227-435-450 = q-U-n227-435-450 = q-U-n227-435-450 = q-U-n227-435-450 = q-U-n227-435-450 = q-U-n227-435-450
7. Exception handling
8. All Python objects have three features
9. Boolean values
10. Object identity comparison
11, CMP ()
12. STR () and repr()
13. Isinstance () and type() are code optimizations
14. Classification of standard types
Operations between different data types
16, Python division:
17. Factory function
18. Built-in functions
(1) Built-in functions for all data types:
(2) Built-in functions for integers:
Boolean value
20. Modules related to numeric types
21. Random number, import the random module
Example:
22, Member operator (in, notin)
Len () to obtain the length of the sequence
24. Negative indexes can be used to access elements in a sequence
25. Sequence slicing operation
String, sequence, tuple type conversion
Built-in functions available for sequence types
28. Strings
29. String module
30. String formatting
31. Original string
Unicode string operator (u/ u)
String built-in function
For various built-in functions, see API
34. String in triple quotation marks
35. String immutability
36. Unicode characters
37, lists,
38, yuan group
39, dictionary
40, collections,
Conditions and cycles
42, abnormal
43, functions,
44, modules,
Object-oriented programming
