London | 26-March-SDC | Ammad Ur Rehman | Sprint 4 | Implement shell tools (cat, ls, wc) in Python#540
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Jun 20, 2026
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Good job, left several comments, could you fix them please?
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README requires cat -n sample-files/*.txt to behave like real cat -n, which numbers lines continuously across all files
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Real cat produces:
cat -n sample-files/*.txt
1 Once upon a time...
1 There was a house made of gingerbread.
1 It looked delicious.
2 I was tempted to take a bite of it.
3 But this seemed like a bad idea...
4
5 There's more to come, though...Python cat produces:
python3 cat.py -n sample-files/*.txt
1 Once upon a time...
1 There was a house made of gingerbread.
1 It looked delicious.
2 I was tempted to take a bite of it.
3 But this seemed like a bad idea...
4
5 There's more to come, though...The only difference is the indentation.
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| entries = os.listdir(args.filepath) |
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Does os.listdir return dir list in an alphabetical order? Compare with what real ls does
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When I run ls -a, it produces:
. ls.py README.md
.. node_modules sample-filesWhen I run the Python variant, python3 ls.py -a:
. .. README.md ls.py node_modules sample-filesThe alphabetically ordering does not match.
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Thanks for the review. I've made some changes. |
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Reimplement the shell programs as a Python program.