def to_tuple(t):
if t is None or isinstance(t, (str, int, complex, float, bytes)) or t is Ellipsis:
return t
elif isinstance(t, list):
return [to_tuple(e) for e in t]
result = [t.__class__.__name__]
if hasattr(t, 'lineno') and hasattr(t, 'col_offset'):
result.append((t.lineno, t.col_offset))
if hasattr(t, 'end_lineno') and hasattr(t, 'end_col_offset'):
result[-1] += (t.end_lineno, t.end_col_offset)
if t._fields is None:
return tuple(result)
for f in t._fields:
result.append(to_tuple(getattr(t, f)))
return tuple(result)