Issue #20406: Use Python application icons for Idle window title bars.

Patch mostly by Serhiy Storchaka.

Lib/idlelib/PyShell.py

@@ -15,7 +15,7 @@ import io
 
 import linecache
 from code import InteractiveInterpreter
-from platform import python_version
+from platform import python_version, system
 
 try:
     from Tkinter import *
@@ -1536,6 +1536,18 @@ def main():
     # start editor and/or shell windows:
     root = Tk(className="Idle")
 
+    # set application icon
+    icondir = os.path.join(os.path.dirname(__file__), 'Icons')
+    if system() == 'Windows':
+        iconfile = os.path.join(icondir, 'idle.ico')
+        root.wm_iconbitmap(default=iconfile)
+    elif TkVersion >= 8.5:
+        ext = '.png' if TkVersion >= 8.6 else '.gif'
+        iconfiles = [os.path.join(icondir, 'idle_%d%s' % (size, ext))
+                     for size in (16, 32, 48)]
+        icons = [PhotoImage(file=iconfile) for iconfile in iconfiles]
+        root.tk.call('wm', 'iconphoto', str(root), "-default", *icons)
+
     fixwordbreaks(root)
     root.withdraw()
     flist = PyShellFileList(root)

Misc/NEWS

@@ -211,6 +211,9 @@ Tools/Demos
 IDLE
 ----
 
+- Issue #20406: Use Python application icons for Idle window title bars.
+  Patch mostly by Serhiy Storchaka.
+
 - Issue #17721: Remove non-functional configuration dialog help button until we
   make it actually gives some help when clicked. Patch by Guilherme Simões.