def read(self, size=-1):
    if size < 0:
      offset = len(self._buffer)
    else:
      offset = self._offset + size
    return self.read_to_offset(offset)
Returns bytes from self._buffer and update related offsets.
dataset/ETHPy150Open GoogleCloudPlatform/billing-export-python/cloudstorage/storage_api.py/_Buffer.read