Satisfy mypy requirements (#2053)

.pre-commit-config.yaml

@@ -54,7 +54,7 @@ repos:
         exclude: ^(docs)
 
   - repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v1.11.2
+    rev: v1.12.0
     hooks:
       - id: mypy
         additional_dependencies:

holidays/groups/buddhist.py

@@ -26,7 +26,7 @@ def __init__(self, cls=None, show_estimated=False) -> None:
         self._buddhist_calendar_show_estimated = show_estimated
 
     def _add_buddhist_calendar_holiday(
-        self, name: str, dt_estimated: tuple[date, bool]
+        self, name: str, dt_estimated: tuple[Optional[date], bool]
     ) -> Optional[date]:
         """
         Add Buddhist calendar holiday.
@@ -37,11 +37,15 @@ def _add_buddhist_calendar_holiday(
         estimated_label = getattr(self, "estimated_label", "%s (estimated)")
         dt, is_estimated = dt_estimated
 
-        return self._add_holiday(
-            self.tr(estimated_label) % self.tr(name)
-            if is_estimated and self._buddhist_calendar_show_estimated
-            else name,
-            dt,
+        return (
+            self._add_holiday(
+                self.tr(estimated_label) % self.tr(name)
+                if is_estimated and self._buddhist_calendar_show_estimated
+                else name,
+                dt,
+            )
+            if dt
+            else None
         )
 
     def _add_vesak(self, name) -> Optional[date]:

holidays/groups/chinese.py

@@ -48,7 +48,7 @@ def _mid_autumn_festival(self):
         return self._chinese_calendar.mid_autumn_date(self._year)[0]
 
     def _add_chinese_calendar_holiday(
-        self, name: str, dt_estimated: tuple[date, bool], days_delta: int = 0
+        self, name: str, dt_estimated: tuple[Optional[date], bool], days_delta: int = 0
     ) -> Optional[date]:
         """
         Add Chinese calendar holiday.
@@ -59,14 +59,18 @@ def _add_chinese_calendar_holiday(
         estimated_label = getattr(self, "estimated_label", "%s (estimated)")
         dt, is_estimated = dt_estimated
 
-        if days_delta != 0:
+        if days_delta and dt:
             dt = _timedelta(dt, days_delta)
 
-        return self._add_holiday(
-            self.tr(estimated_label) % self.tr(name)
-            if is_estimated and self._chinese_calendar_show_estimated
-            else name,
-            dt,
+        return (
+            self._add_holiday(
+                self.tr(estimated_label) % self.tr(name)
+                if is_estimated and self._chinese_calendar_show_estimated
+                else name,
+                dt,
+            )
+            if dt
+            else None
         )
 
     def _add_chinese_birthday_of_buddha(self, name) -> Optional[date]:

holidays/groups/hindu.py

@@ -26,7 +26,7 @@ def __init__(self, cls=None, show_estimated=False) -> None:
         self._hindu_calendar_show_estimated = show_estimated
 
     def _add_hindu_calendar_holiday(
-        self, name: str, dt_estimated: tuple[date, bool]
+        self, name: str, dt_estimated: tuple[Optional[date], bool]
     ) -> Optional[date]:
         """
         Add Hindu calendar holiday.
@@ -37,11 +37,15 @@ def _add_hindu_calendar_holiday(
         estimated_label = getattr(self, "estimated_label", "%s (estimated)")
         dt, is_estimated = dt_estimated
 
-        return self._add_holiday(
-            self.tr(estimated_label) % self.tr(name)
-            if is_estimated and self._hindu_calendar_show_estimated
-            else name,
-            dt,
+        return (
+            self._add_holiday(
+                self.tr(estimated_label) % self.tr(name)
+                if is_estimated and self._hindu_calendar_show_estimated
+                else name,
+                dt,
+            )
+            if dt
+            else None
         )
 
     def _add_diwali(self, name) -> Optional[date]: