Class BinaryLogStream

Lib/_android_support.py:109–139

class BinaryLogStream(io.RawIOBase):
    def __init__(self, prio, tag, fileno=None):
        self.prio = prio
        self.tag = tag
        self._fileno = fileno

    def __repr__(self):
        return f"<BinaryLogStream {self.tag!r}>"

    def writable(self):
        return True

    def write(self, b):
        if type(b) is not bytes:
            try:
                b = bytes(memoryview(b))
            except TypeError:
                raise TypeError(
                    f"write() argument must be bytes-like, not {type(b).__name__}"
                ) from None

        # Writing an empty string to the stream should have no effect.
        if b:
            logcat.write(self.prio, self.tag, b)
        return len(b)

    # This is needed by the test suite --timeout option, which uses faulthandler.
    def fileno(self):
        if self._fileno is None:
            raise io.UnsupportedOperation("fileno")
        return self._fileno


# When a large volume of data is written to logcat at once, e.g. when a test