Spyder 5.3.3 IPython-console not properly doing input() on Mac

[a2-c-martin]

Problem Description

In spyder 5.3.3 the execution of input() on silicon Macs does not work properly
->spyder 5.2.2 is working perfect

What steps reproduce the problem?

while True:
    print(input("Enter something:"))

What is the expected output? What do you see instead?

EXPECTED:

Enter something:1
1

Enter something:1
1

Enter something:1
1

WHATS HAPPENING:

Enter something:1
1Enter something:
111

Paste Traceback/Error Below (if applicable)

no errors

Versions

• Spyder version: 5.2.2
• Python version: 3.9
• Qt version: 5.15.2
• PyQt version: PyQt5 5.15.7
• Operating System name/version: MacOS 12.5.1

Dependencies

PASTE DEPENDENCIES HERE

[ccordoba12]

Hey @a2-c-martin, thanks for reporting. I thought this was fixed already, but we'll take a look at it.

@mrclary, could you check if you're getting the same problem on Mac? Thanks!

[a2-c-martin]

Dear Carlos Thank you! Today we had This issue on 3 Machines: apple m1 and MacBook Air M2. So i thought this seems remarkable. Finally I installed spyder 5.2.2 in a new Anaconda environment. This one works properly.:) Regards Martin Am 19.10.2022 um 17:58 schrieb Carlos Cordoba ***@***.***>:  Hey @a2-c-martin<https://github.com/a2-c-martin>, thanks for reporting. I thought this was fixed already, but we'll take a look at it. @mrclary<https://github.com/mrclary>, could you check if you're getting the same problem on Mac? Thanks! — Reply to this email directly, view it on GitHub<#19888 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/ABFD4BIZACB3NUFCQ7ERIB3WEALBLANCNFSM6AAAAAARJE7PZQ>. You are receiving this because you were mentioned.Message ID: ***@***.***>

[mrclary]

I tested on
Okay, I can confirm the following running from bootstrap on the latest 5.x commit:

• this issue does manifest on macOS 12.6 (Intel)
• this issues does not manifest on my Windows 10 or Ubuntu 20.04 VM

Note that the number of successful input handlings can vary. I found as little as 2 and as many as 14 in some cases.

Race condition of some kind?

[ccordoba12]

@mrclary, could you check if removing this if and leaving the line below fixes the problem on Mac?

spyder/external-deps/qtconsole/qtconsole/console_widget.py

Lines 2486 to 2487 in 4db6cd0

	if not sys.platform == 'darwin':
	QtCore.QCoreApplication.processEvents()

[mrclary]

@mrclary, could you check if removing this if and leaving the line below fixes the problem on Mac?

spyder/external-deps/qtconsole/qtconsole/console_widget.py

Lines 2486 to 2487 in 4db6cd0

	if not sys.platform == 'darwin':
	QtCore.QCoreApplication.processEvents()

That does solve the issue!

[ccordoba12]

Ok, thanks for the confirmation @mrclary. I added that if because I thought it was not needed on Mac. Furthermore, that processEvents is making both Qtconsole and Spyder test suites hang on Mac.

But I'll add a workaround so that it's not called while running tests but it is in regular use.