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Fixes The Bug In Radix Tree. Issue #11316 - #11385

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cclauss merged 21 commits into
TheAlgorithms:masterfrom
covid-in:turing-code
Sep 10, 2026
Merged

Fixes The Bug In Radix Tree. Issue #11316 #11385
cclauss merged 21 commits into
TheAlgorithms:masterfrom
covid-in:turing-code

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@covid-in

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Describe your change:

Fixes #11316 .
There is a bug in the code which doesn't handle the edge case when the insertion of empty string is done.

  • Add an algorithm?
  • Fix a bug or typo in an existing algorithm?
  • Add or change doctests? -- Note: Please avoid changing both code and tests in a single pull request.
  • Documentation change?

Checklist:

  • I have read CONTRIBUTING.md.
  • This pull request is all my own work -- I have not plagiarized.
  • I know that pull requests will not be merged if they fail the automated tests.
  • This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms.
  • All new Python files are placed inside an existing directory.
  • All filenames are in all lowercase characters with no spaces or dashes.
  • All functions and variable names follow Python naming conventions.
  • All function parameters and return values are annotated with Python type hints.
  • All functions have doctests that pass the automated testing.
  • All new algorithms include at least one URL that points to Wikipedia or another similar explanation.
  • If this pull request resolves one or more open issues then the description above includes the issue number(s) with a closing keyword: "Fixes #ISSUE-NUMBER".

@covid-in covid-in changed the title Fixes The Bug In Radix Tree. Issue #11316 Fixes The Bug In Radix Tree. Issue #11316 Apr 25, 2024
@algorithms-keeper algorithms-keeper Bot added the tests are failing Do not merge until tests pass label Apr 25, 2024
rtron-24 and others added 3 commits April 25, 2024 19:25
Based on ruff Recommendations
    - Removed WhiteSpaces
    - Moved the Import to beginning
    - Replaced assertTrue with regular assert
@algorithms-keeper algorithms-keeper Bot added the awaiting reviews This PR is ready to be reviewed label Apr 25, 2024
@algorithms-keeper algorithms-keeper Bot removed the tests are failing Do not merge until tests pass label Apr 25, 2024
@covid-in

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Hey @spazm. Can you please review this PR. Radix Tree had a bug. And Excuse me for the commit mess. Ruff gave me some problems

@rtron-24 rtron-24 left a comment

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I approve the changes.

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Reviewed

Comment thread data_structures/trie/radix_tree.py Outdated
@@ -1,3 +1,5 @@
import unittest

@cclauss cclauss May 1, 2024

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We (and the majority of the Python community) use pytest instead of unittest so all this boilerplate is not needed.

As discussed in CONTRIBUTING.md, changing both code and tests in a single pull request makes code review quite difficult.

Can you please create a separate simple pull request that adds a test that proves that word = "" fails?

Once that is proven, we can determine how to proceed with this pull request.

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It fails on subseunt recursive calls not on direct addition of "". Please check the issue it is trying to fix. I have added the same word insertions in Unit Test as well


return True

class TestRadixNode(unittest.TestCase):

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This boilerplate adds unnecessary complexity.

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Sure Will Remove it. But its the best way to do this

Refactor comments for clarity and correctness in radix_tree.py.
pre-commit-ci Bot and others added 2 commits September 10, 2026 11:12
Added a test function for the RadixNode class to validate insertion, search, and deletion of words.
@algorithms-keeper algorithms-keeper Bot removed the awaiting reviews This PR is ready to be reviewed label Sep 10, 2026
@cclauss
cclauss merged commit 1d83421 into TheAlgorithms:master Sep 10, 2026
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data_structures/trie/radix_tree.py wont really end up in 'case 1' for insert

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