Enumerate FindInMap when can't be resolved (#3246)

* Enumerate FindInMap when can't be resolved
* Fix new pylint issues

Author: kddejong

src/cfnlint/rules/resources/events/RuleScheduleExpression.py

@@ -50,10 +50,9 @@ def check_rate(self, value, path):
                 RuleMatch(path, f"Rate Value {items[0]!r} should be greater than 0.")
             ]
 
+        valid_periods = ["minutes", "hours", "days"]
         if float(items[0]) <= 1:
             valid_periods = ["minute", "hour", "day"]
-        elif float(items[0]) > 1:
-            valid_periods = ["minutes", "hours", "days"]
         # Check the Unit
         if items[1] not in valid_periods:
             return [

src/cfnlint/rules/resources/properties/ValueRefGetAtt.py

@@ -132,6 +132,8 @@ def check_value_getatt(self, value, path, **kwargs):
         property_type = kwargs.get("property_type")
         property_name = kwargs.get("property_name")
         # You can sometimes get a list or a string with . in it
+        resource_name = ""
+        resource_attribute = []
         if isinstance(value, list):
             resource_name = value[0]
             if len(value[1:]) == 1:

src/cfnlint/template/transforms/_language_extensions.py

@@ -159,19 +159,15 @@ def _walk(self, item: Any, params: MutableMapping[str, Any], cfn: Any):
                     try:
                         mapping = _ForEachValueFnFindInMap(get_hash(v), v)
                         map_value = mapping.value(cfn, params, True, False)
-                        # if we get None this means its all strings but couldn't be resolved
-                        # we will pass this forward
-                        if map_value is None:
-                            continue
                         # if we can resolve it we will return it
                         if isinstance(map_value, tuple([list]) + _SCALAR_TYPES):
                             return map_value
                     except Exception as e:  # pylint: disable=broad-exception-caught
                         # We couldn't resolve the FindInMap so we are going to leave it as it is
                         LOGGER.debug("Transform and Fn::FindInMap error: %s", {str(e)})
-                        for i, el in enumerate(v):
-                            v[i] = self._walk(el, params, cfn)
-                        obj[k] = v
+                    for i, el in enumerate(v):
+                        v[i] = self._walk(el, params, cfn)
+                    obj[k] = v
                 elif k == "Ref":
                     if isinstance(v, str):
                         if v in params: