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例如如下可复现例子：
from typing import TypeVar T = TypeVar("T") def is_bigger(a: T, b: T)->bool: return a > b 类型检查库 Pyright 报错如下：
Operator ">" not supported for types "T" and "T" 类型检查库 MyPy 报错如下：
Unsupported left operand type for > ("T")  | 1 ericls Jan 2, 2021 给一个 `__lt__` |
 | 2 Trim21 Jan 2, 2021  3 |
 | 3 littleMaple OP @Trim21 正解，谢谢大佬！看来使用 Python 类型标注需要额外封装的东西也不少啊 |
 | 4 abersheeran Jan 2, 2021 @littleMaple 是的。还需慢慢发展。 |
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