Issue #12288: Consider '0' and '0.0' as valid initialvalue for tkinter SimpleDialog.
diff --git a/Lib/tkinter/simpledialog.py b/Lib/tkinter/simpledialog.py
index 885804b..45302b4 100644
--- a/Lib/tkinter/simpledialog.py
+++ b/Lib/tkinter/simpledialog.py
@@ -282,7 +282,7 @@
self.entry = Entry(master, name="entry")
self.entry.grid(row=1, padx=5, sticky=W+E)
- if self.initialvalue:
+ if self.initialvalue is not None:
self.entry.insert(0, self.initialvalue)
self.entry.select_range(0, END)
diff --git a/Misc/ACKS b/Misc/ACKS
index e04677e..1a094a1 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -633,6 +633,7 @@
Mike Meyer
Steven Miale
Trent Mick
+Tom Middleton
Stan Mihai
Stefan Mihaila
Aristotelis Mikropoulos
diff --git a/Misc/NEWS b/Misc/NEWS
index 5ede324..454a70c 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -98,6 +98,9 @@
Library
-------
+- Issue #12288: Consider '0' and '0.0' as valid initialvalue
+ for tkinter SimpleDialog.
+
- Issue #15489: Add a __sizeof__ implementation for BytesIO objects.
Patch by Serhiy Storchaka.