docstr: Return the single namespace bound to this name.
  
  Raises ValueError if the name is bound to multiple namespaces
  or no namespace.
code: def get_namespace(self):
      """Return the single namespace bound to this name.
  
      Raises ValueError if the name is bound to multiple namespaces
      or no namespace.
      """
      if len(self.__namespaces) == 0:
          raise ValueError("name is not bound to any namespaces")
      elif len(self.__namespaces) > 1:
          raise ValueError("name is bound to multiple namespaces")
      else:
          return self.__namespaces[0]
  
imports: import _symtable
  from _symtable import USE, DEF_GLOBAL, DEF_NONLOCAL, DEF_LOCAL, DEF_PARAM, DEF_IMPORT, DEF_BOUND, DEF_ANNOT, SCOPE_OFF, SCOPE_MASK, FREE, LOCAL, GLOBAL_IMPLICIT, GLOBAL_EXPLICIT, CELL
  import weakref
label_desc: Use image node_id 18 for calling the Symbol obj's underlying member method code with example usage: obj.get_namespace() and returns: self