idle cannot save file with non ascii character, leading to: Exception in Tkinter callback Traceback (most recent call last): File "/usr/lib64/python3.8/tkinter/__init__.py", line 1883, in __call__ return self.func(*args) File "/usr/lib64/python3.8/idlelib/multicall.py", line 176, in handler r = l[i](event) File "/usr/lib64/python3.8/idlelib/iomenu.py", line 199, in save else: File "/usr/lib64/python3.8/idlelib/iomenu.py", line 232, in writefile text = self.fixnewlines() File "/usr/lib64/python3.8/idlelib/iomenu.py", line 271, in encode encoded = chars.encode('ascii', 'replace') NameError: name 'io' is not defined just adding `import io` seems to fix this.

Your suggestion is correct. A side issue is that the line numbers in the traceback are correct but the quoted text lines from iomenu (and only iomenu) are wrong, being from the line previous. I will have to investigate this discrepancy. After the patch, two weeks ago, for #41158, iomenu line 199 in save is if self.writefile(self.filename): line 232 in writefile is chars = self.encode(text) line 291 in encode is enc, _ = tokenize.detect_encoding(io.BytesIO(encoded).readline) This is only tried if ascii encoding fails and require the addition of 'import io'. Before I close this, I will try to add a unittest that similarly fails without the import added, as well as some others for other exit points.

Łukasz, please pull this simple fix to a 3.9.0b4 and 3.8.4 regression into 3.8.5. It disabled saving files with non-ascii chars.

 New changeset 38d3864efe914fda64553e2ec75c9ec15574483f by Terry Jan Reedy in branch 'master': bpo-41300: IDLE - save files with non-ascii chars (GH-21512) https://github.com/python/cpython/commit/38d3864efe914fda64553e2ec75c9ec15574483f 

 New changeset 5a7aa280457423b97512810d6d9baac37f99fbf4 by Miss Islington (bot) in branch '3.9': bpo-41300: IDLE - save files with non-ascii chars (GH-21512) https://github.com/python/cpython/commit/5a7aa280457423b97512810d6d9baac37f99fbf4 

 New changeset ffeb9202540c07d384f82ff3ab86c37c1433283a by Miss Islington (bot) in branch '3.8': [3.8] bpo-41300: IDLE - save files with non-ascii chars (GH-21512) https://github.com/python/cpython/commit/ffeb9202540c07d384f82ff3ab86c37c1433283a 

Łukasz, Please cherry-pick the 3.8 backport, ffeb920, as it has a 3.8-specific fixup to idlelib/NEWS.txt. I verified the bug and fix on Windows. I am leaving this open to add automated tests.

Problem also reported on #41319

#41319 should be closed as a duplicate, but site will not currently allow me to do so.

Released.

The fix is in both 3.8.5 and 3.9.0b5, both released today. "print('eyes ∢∢ snake 🐍')", for instance, in the editor, can be saved and run. (Note that astral chars like the snake disrupt editing a bit, but once there, can be saved and will print. Łukasz, thanks for getting this in. I am leaving this open to add tests, but will remove you as nosy.

#41373 is about another issue with the new iomenu code. I will close this and add tests there.