【完善】串口设备自动补全功能
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@ -345,7 +345,7 @@ class UART(object):
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"""
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...
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def read(self, nbytes: Optional[int]) -> bytes:
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def read(self, nbytes: Optional[int] = None) -> bytes:
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"""Read characters. If ``nbytes`` is specified then read at most that many
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bytes, otherwise read as much data as possible.
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