code: def visit_Assign(self, node):
          
          value_deps = self.visit(node.value)
          for target in node.targets:
              name = get_variable(target)
              if isinstance(name, ast.Name):
                  self.naming[name.id] = value_deps
docs: In case of assignment assign value depend on r-value type dependencies.
  
          It is valid for subscript, `a[i] = foo()` means `a` type depend on
          `foo` return type.