1, sub-mechanism resides small data pool : to know exactly when the late stage of development, why is not working, things often placed in the rules, the numbers are: -5-256 string: When defining content (excluding Chinese) same, to be resident.
Block: a py file, a function, a module, a class, each row in the interactive mode.
Sequence: first block of code, data after performing a small pool.
2, is (are) determined on both sides is not a content, it is carried out by determining the memory address.
3, == (content determined is the same on both sides of the equal sign)
4、