code: def __init__(self, global_type, row_type, row_key):
      self.global_type = global_type
      self.row_type = row_type
      self.row_key = row_key
  
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 3 to create a new ttable object from inherited base classes: object with example: obj = ttable(global_type, row_type, row_key)