Python/swagger-codegen-cli list types in swagger_types does not work for list of primitives

Description

This issue is in relation to the swagger_types dictionary found in the model classes. If a key has a value of a list of primitive types, the setter for that key or attribute does not actually accept a list of primitives. It only accepts a string.

Swagger-codegen version

swagger-codegen-cli version 2.2.1

Swagger declaration file content or url

self.swagger_types = { "foo", "list[str]" }

if I try to set "foo" to ["foo"] or to ["foo1", "foo2"], it will return this error:

ValueError: Invalid value for foo (['foo']), must be one of ['foo', 'foo1', 'foo2']

The issue is found in the setter for foo. For example:

@foo.setter
  def foo(self, foos):
      """
      Sets the foos of this Object.


      :param foos: The foos of this Object.
      :type: list[str]
      """
      allowed_values = ["foo", "foo1", "foo2"]
      if foos not in allowed_values:
          raise ValueError(
              "Invalid value for `foos` ({0}), must be one of {1}"
              .format(foos, allowed_values)
          )

      self._foos = foos

Suggest a fix/enhancement

My suggestion is to loop through the values in the list before checking if that value is in allowed_values.

@foo.setter
def foo(self, foos):
"""
Sets the foos of this Object.

  :param foos: The foos of this Object.
  :type: list[str]
  """
  allowed_values = ["foo", "foo1", "foo2"]
  for foo in foos:
      if foo not in allowed_values:
          raise ValueError(
              "Invalid value for `foo ` ({0}), must be one of {1}"
              .format(foo , allowed_values)
          )

  self._foos = foos

Start by locating the swagger-codegen-cli template or generator responsible for Python model setters, then reproduce the issue with a list[str] declaration and allowed values such as ["foo", "foo1", "foo2"]. Done means generated setters accept valid lists of primitives, reject invalid elements, and retain the existing scalar validation behavior.