Type object 'type' has no attribute 'domain'

[longqianh]

Following the jwave tutorial (https://ucl-bug.github.io/jwave/notebooks/prerequisites.html#fields), I got an error when calling z = field_on_plane(coords).

The error is: AttributeError: type object 'type' has no attribute 'domain'/

I found the error was in Linear.eq function where it called .domain (discretization.py, line 25)

I solved this bug by adding a Field class check:

  # def __eq__(self, other):
  #   return tree_equal(self, other) * (self.domain == other.domain)
  def __eq__(self, other):
    if not isinstance(other, self.__class__):
        return False
    return tree_equal(self, other) and (self.domain == other.domain)

I hope this makes sense to you, thanks!