[tkinter] Allow any return value for invalidcommand

Tk only evaluates the invalidcommand (invcmd) script when validatecommand
returns false and ignores whatever it returns, so Callable[[], bool] was
too strict and rejected ordinary callbacks that return None. Widen it to
Callable[[], object] on all Entry, Spinbox, ttk.Entry, ttk.Combobox and
ttk.Spinbox sites. validatecommand keeps Callable[[], bool] because Tk
does use its result.

Closes #10578

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: ekanshul

stdlib/tkinter/__init__.pyi

@@ -2236,8 +2236,8 @@ class Entry(Widget, XView):
         insertofftime: int = 300,
         insertontime: int = 600,
         insertwidth: float | str = ...,
-        invalidcommand: str | list[str] | tuple[str, ...] | Callable[[], bool] = "",
-        invcmd: str | list[str] | tuple[str, ...] | Callable[[], bool] = "",  # same as invalidcommand
+        invalidcommand: str | list[str] | tuple[str, ...] | Callable[[], object] = "",
+        invcmd: str | list[str] | tuple[str, ...] | Callable[[], object] = "",  # same as invalidcommand
         justify: Literal["left", "center", "right"] = "left",
         name: str = ...,
         readonlybackground: str = ...,
@@ -2281,8 +2281,8 @@ class Entry(Widget, XView):
         insertofftime: int = ...,
         insertontime: int = ...,
         insertwidth: float | str = ...,
-        invalidcommand: str | list[str] | tuple[str, ...] | Callable[[], bool] = ...,
-        invcmd: str | list[str] | tuple[str, ...] | Callable[[], bool] = ...,
+        invalidcommand: str | list[str] | tuple[str, ...] | Callable[[], object] = ...,
+        invcmd: str | list[str] | tuple[str, ...] | Callable[[], object] = ...,
         justify: Literal["left", "center", "right"] = ...,
         readonlybackground: str = ...,
         relief: Literal["raised", "sunken", "flat", "ridge", "solid", "groove"] = ...,
@@ -4123,8 +4123,8 @@ class Spinbox(Widget, XView):
         insertofftime: int = 300,
         insertontime: int = 600,
         insertwidth: float | str = ...,
-        invalidcommand: str | list[str] | tuple[str, ...] | Callable[[], bool] = "",
-        invcmd: str | list[str] | tuple[str, ...] | Callable[[], bool] = "",
+        invalidcommand: str | list[str] | tuple[str, ...] | Callable[[], object] = "",
+        invcmd: str | list[str] | tuple[str, ...] | Callable[[], object] = "",
         justify: Literal["left", "center", "right"] = "left",
         name: str = ...,
         readonlybackground: str = ...,
@@ -4181,8 +4181,8 @@ class Spinbox(Widget, XView):
         insertofftime: int = ...,
         insertontime: int = ...,
         insertwidth: float | str = ...,
-        invalidcommand: str | list[str] | tuple[str, ...] | Callable[[], bool] = ...,
-        invcmd: str | list[str] | tuple[str, ...] | Callable[[], bool] = ...,
+        invalidcommand: str | list[str] | tuple[str, ...] | Callable[[], object] = ...,
+        invcmd: str | list[str] | tuple[str, ...] | Callable[[], object] = ...,
         justify: Literal["left", "center", "right"] = ...,
         readonlybackground: str = ...,
         relief: Literal["raised", "sunken", "flat", "ridge", "solid", "groove"] = ...,

stdlib/tkinter/ttk.pyi

@@ -340,7 +340,7 @@ class Entry(Widget, tkinter.Entry):
         exportselection: bool = True,
         font: _FontDescription = "TkTextFont",
         foreground: str = "",
-        invalidcommand: str | list[str] | tuple[str, ...] | Callable[[], bool] = "",
+        invalidcommand: str | list[str] | tuple[str, ...] | Callable[[], object] = "",
         justify: Literal["left", "center", "right"] = "left",
         name: str = ...,
         show: str = "",
@@ -364,7 +364,7 @@ class Entry(Widget, tkinter.Entry):
         exportselection: bool = ...,
         font: _FontDescription = ...,
         foreground: str = ...,
-        invalidcommand: str | list[str] | tuple[str, ...] | Callable[[], bool] = ...,
+        invalidcommand: str | list[str] | tuple[str, ...] | Callable[[], object] = ...,
         justify: Literal["left", "center", "right"] = ...,
         show: str = ...,
         state: str = ...,
@@ -390,7 +390,7 @@ class Entry(Widget, tkinter.Entry):
         exportselection: bool = ...,
         font: _FontDescription = ...,
         foreground: str = ...,
-        invalidcommand: str | list[str] | tuple[str, ...] | Callable[[], bool] = ...,
+        invalidcommand: str | list[str] | tuple[str, ...] | Callable[[], object] = ...,
         justify: Literal["left", "center", "right"] = ...,
         show: str = ...,
         state: str = ...,
@@ -421,7 +421,7 @@ class Combobox(Entry):
         font: _FontDescription = ...,  # undocumented
         foreground: str = ...,  # undocumented
         height: int = 10,
-        invalidcommand: str | list[str] | tuple[str, ...] | Callable[[], bool] = ...,  # undocumented
+        invalidcommand: str | list[str] | tuple[str, ...] | Callable[[], object] = ...,  # undocumented
         justify: Literal["left", "center", "right"] = "left",
         name: str = ...,
         postcommand: Callable[[], object] | str = "",
@@ -448,7 +448,7 @@ class Combobox(Entry):
         font: _FontDescription = ...,
         foreground: str = ...,
         height: int = ...,
-        invalidcommand: str | list[str] | tuple[str, ...] | Callable[[], bool] = ...,
+        invalidcommand: str | list[str] | tuple[str, ...] | Callable[[], object] = ...,
         justify: Literal["left", "center", "right"] = ...,
         postcommand: Callable[[], object] | str = ...,
         show=...,
@@ -477,7 +477,7 @@ class Combobox(Entry):
         font: _FontDescription = ...,
         foreground: str = ...,
         height: int = ...,
-        invalidcommand: str | list[str] | tuple[str, ...] | Callable[[], bool] = ...,
+        invalidcommand: str | list[str] | tuple[str, ...] | Callable[[], object] = ...,
         justify: Literal["left", "center", "right"] = ...,
         postcommand: Callable[[], object] | str = ...,
         show=...,
@@ -1068,7 +1068,7 @@ class Spinbox(Entry):
         format: str = "",
         from_: float = 0,
         increment: float = 1,
-        invalidcommand: str | list[str] | tuple[str, ...] | Callable[[], bool] = ...,  # undocumented
+        invalidcommand: str | list[str] | tuple[str, ...] | Callable[[], object] = ...,  # undocumented
         justify: Literal["left", "center", "right"] = ...,  # undocumented
         name: str = ...,
         show=...,  # undocumented
@@ -1099,7 +1099,7 @@ class Spinbox(Entry):
         format: str = ...,
         from_: float = ...,
         increment: float = ...,
-        invalidcommand: str | list[str] | tuple[str, ...] | Callable[[], bool] = ...,
+        invalidcommand: str | list[str] | tuple[str, ...] | Callable[[], object] = ...,
         justify: Literal["left", "center", "right"] = ...,
         show=...,
         state: str = ...,