D - Glossary (Python)

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declare

• means to tell a name existence to BC so no memory allocation happens because an object isn't created:
  • E.g. v: int and def func(x: int) -> None: ....

define

• means to declare, then to ask VM to allocate memory in RAM for an object:
  • E.g. v: int = 100 and def func(x: int = 100) -> None: ....
  • define includes the meaning of declare because for v: int = 100, we say only define but not declare, then define.

dynamic type

• is the implicit type always inferred by VM at rtime.
• can be called runtime type but I use dynamic type because it's completely opposite to static type, which is more intuitive.