(str|bytes).(r)find don't take kwargs

Feature or enhancement

Proposal:

'test'.find('e',end=3) # this currently just gives a "TypeError: str.find() takes no keyword arguments" same for the others
b'test2\x00garbage'.rfind(b'\0',start=4)

Has this already been discussed elsewhere?

This is a minor feature, which does not need previous discussion elsewhere

Links to previous discussion of this feature:

No response

首先定位 str.find、str.rfind、bytes.find 和 bytes.rfind 的实现及测试。检查它们的 start 和 end 参数当前是如何处理的，然后为与示例匹配的关键字参数添加覆盖；当这些调用能够在不出现 TypeError 的情况下正常工作，且现有行为保持不变时，即表示完成。