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- from typing import List, TypeVar
- T = TypeVar("T")
- class Stack(List[T]):
- """A small shim over builtin list."""
- @property
- def top(self) -> T:
- """Get top of stack."""
- return self[-1]
- def push(self, item: T) -> None:
- """Push an item on to the stack (append in stack nomenclature)."""
- self.append(item)
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