Introduce brief python object's property (builtin functions and/or properties) 102

1. Python Object 102
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2. Continue
https://www.slideshare.net/jtsai5/20181116-python-object-101

3. Abstraction
• With-statement
• Copy
• Object property and attribute
• Special Methods

4. With-statement
• With-statement
• __enter__ and __exit__

5. Copy
• Copy object
• Python builtin library : https://docs.python.org/3.7/
library/copy.html
• copy and deep copy
• __copy__ and __deepcopy__

6. Object Property
• Object attribute and property
• __dict__ vs __slots__
• Memory size

7. Object Reference
• Weak Reference
• Python builtin library : https://docs.python.org/3/
library/weakref.html
• __weakref__

8. Special Methods
• Python string to integer
• isdecimal vs isdigit vs isnumberic

9. Not Q&A Time