def readline()

in server/scripts/cloudstorage/storage_api.py [0:0]

• 20 lines of code
• 6 McCabe index (conditional complexity)

  def readline(self, size=-1):
    """Read one line delimited by '\n' from the file.

    A trailing newline character is kept in the string. It may be absent when a
    file ends with an incomplete line. If the size argument is non-negative,
    it specifies the maximum string size (counting the newline) to return.
    A negative size is the same as unspecified. Empty string is returned
    only when EOF is encountered immediately.

    Args:
      size: Maximum number of bytes to read. If not specified, readline stops
        only on '\n' or EOF.

    Returns:
      The data read as a string.

    Raises:
      IOError: When this buffer is closed.
    """
    self._check_open()
    if size == 0 or not self._remaining():
      return ''

    data_list = []
    newline_offset = self._buffer.find_newline(size)
    while newline_offset < 0:
      data = self._buffer.read(size)
      size -= len(data)
      self._offset += len(data)
      data_list.append(data)
      if size == 0 or not self._remaining():
        return ''.join(data_list)
      self._buffer.reset(self._buffer_future.get_result())
      self._request_next_buffer()
      newline_offset = self._buffer.find_newline(size)

    data = self._buffer.read_to_offset(newline_offset + 1)
    self._offset += len(data)
    data_list.append(data)

    return ''.join(data_list)