I cannot get past the first step in the Autocompletion module in Build your own Shell. It seems there is a bug in the test script as can be seen below: [Skærmbillede 2025-04-20 kl. 21.08.29] For some reason it seems that the “Expected” string and the test input does not match (input’s missing the…

@mikkel-larsen You might be able to move that workaround to ~/.editrc instead of including it in your code: [image] [image] readline — GNU readline interface The readline module defines a number of functions to facilitate completion and reading/writing of history files from the Python …

Hey @mikkel-larsen , it doesn’t appear to be a bug on our end. You can try running the program locally to verify that the letter b is indeed being swallowed by readline: [image] The issue seems to stem from this line: readline.parse_and_bind("bind ^I rl_complete"). Removing it allows your code to …

That’s strange. It works for me when I try locally. [Skærmbillede 2025-04-21 kl. 09.25.44] I can’t, however, use tab-completion if I remove readline.parse_and_bind("bind ^I rl_complete"). Though I can see that the tests run successfully on your end without that line. But that means that I cannot…

That’s definitely peculiar. By the way, how did you come across the workaround "bind ^I rl_complete"? Curious why Control-I would map to Tab. :thinking: To help confirm whether you’re using GNU Readline or libedit under the hood, could you share the result of running print(readline.__doc__)? [im…

Definitely! [Skærmbillede 2025-04-21 kl. 09.49.06] And I agree, I was sceptical of the command when I found it (on Reddit), but as it worked I admit I did not think further of it. Reddit - The heart of the internet

Looks like your readline is using libedit instead of GNU Readline. The issue can be resolved by installing GNU Readline: brew install readline

Was already installed. Do I need to do something to make it the default instead of libedit?

My Python is installed via Anaconda, and I just confirmed that readline is installed through conda as well: [image] Not sure if pip install would work in this case.

the .editrc config file did the trick for me! Thank you for the help.

Bug in "Build you own Shell" - Autocompletion

Challenges

andy1li April 21, 2025, 9:28am 12

@mikkel-larsen You might be able to move that workaround to ~/.editrc instead of including it in your code:

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Bug in "Build you own Shell" - Autocompletion

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