code: def __str__(self):
      return f"table {{global: {self.global_type}, row: {self.row_type}, row_key: [{self._key_str()}]}}"
  
imports: import pprint
  from hail.typecheck import typecheck_method, sequenceof
  from hail.utils.java import escape_parsable
  from hail.expr.types import dtype, tstruct
  from hail.utils.java import jiterable_to_list
label_desc: Use image node_id 9 for calling the ttable obj's underlying member method code with example usage: obj.__str__() and returns: str, self, str, self, str, self, str