code: def isfirstline():
      """
      Returns true the line just read is the first line of its file,
      otherwise returns false.
      """
      if not _state:
          raise RuntimeError("no active input()")
      return _state.isfirstline()
  
imports: import io
  import sys, os
  from types import GenericAlias
label_desc: Use image node_id 8 for calling a global function with example usage: isfirstline() and returns: _state