update minimal python version to 3.10 (#8850)

esphome/components/lvgl/lvcode.py

@@ -1,5 +1,4 @@
 import abc
-from typing import Union
 
 from esphome import codegen as cg
 from esphome.config import Config
@@ -75,7 +74,7 @@ class CodeContext(abc.ABC):
     code_context = None
 
     @abc.abstractmethod
-    def add(self, expression: Union[Expression, Statement]):
+    def add(self, expression: Expression | Statement):
         pass
 
     @staticmethod
@@ -89,13 +88,13 @@ class CodeContext(abc.ABC):
         CodeContext.append(RawStatement("}"))
 
     @staticmethod
-    def append(expression: Union[Expression, Statement]):
+    def append(expression: Expression | Statement):
         if CodeContext.code_context is not None:
             CodeContext.code_context.add(expression)
         return expression
 
     def __init__(self):
-        self.previous: Union[CodeContext | None] = None
+        self.previous: CodeContext | None = None
         self.indent_level = 0
 
     async def __aenter__(self):
@@ -121,7 +120,7 @@ class MainContext(CodeContext):
     Code generation into the main() function
     """
 
-    def add(self, expression: Union[Expression, Statement]):
+    def add(self, expression: Expression | Statement):
         return cg.add(self.indented_statement(expression))
 
 
@@ -144,7 +143,7 @@ class LambdaContext(CodeContext):
         self.capture = capture
         self.where = where
 
-    def add(self, expression: Union[Expression, Statement]):
+    def add(self, expression: Expression | Statement):
         self.code_list.append(self.indented_statement(expression))
         return expression
 
@@ -186,7 +185,7 @@ class LvContext(LambdaContext):
     async def __aexit__(self, exc_type, exc_val, exc_tb):
         await super().__aexit__(exc_type, exc_val, exc_tb)
 
-    def add(self, expression: Union[Expression, Statement]):
+    def add(self, expression: Expression | Statement):
         cg.add(expression)
         return expression
 
@@ -303,7 +302,7 @@ lvgl_static = MockObj("LvglComponent", "::")
 
 
 # equivalent to cg.add() for the current code context
-def lv_add(expression: Union[Expression, Statement]):
+def lv_add(expression: Expression | Statement):
     return CodeContext.append(expression)