class_docstr: A file object that provides read access to a part of an existing
  file (for example a TAR file).
docstr: Read a line of text.
  
  :returns: An 8-bit string.
docstr_tok: ["Read","a","line","of","text",".",":","returns",":","An","8-bit","string","."]
code: def readline(self):
      """
      Read a line of text.
  
      :returns: An 8-bit string.
      """
      s = b"" if "b" in self.fh.mode else ""
      newline_character = b"\n" if "b" in self.fh.mode else "\n"
      while True:
          c = self.read(1)
          if not c:
              break
          s = s + c
          if c == newline_character:
              break
      return s
  
file_path: catboost/contrib/python/Pillow/py3/PIL/ContainerIO.py
imports: import io
label_desc: Use image node_id 6 for calling the ContainerIO obj's underlying member method code with example usage: obj.readline() and returns: s