List is not recognized in the GeneratorExp

[Thirumalai-Shaktivel]

Error:

syntax error: Token '[' is unexpected here
 --> examples/expr2.py:1:14
  |
1 | (sstr(x) for [x] in self._module.gens)
  |              ^ 

[Thirumalai-Shaktivel]

Other example:

func(*[[x*y] for [x] in self._module.gens for [y] in J._module.gens])