Skip to content

Add Mirror a Binary Tree solution #9534

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom
Merged
merged 12 commits into from
Oct 24, 2023
Merged

Add Mirror a Binary Tree solution #9534

merged 12 commits into from
Oct 24, 2023

Conversation

gogouravr
Copy link
Contributor

Describe your change: Add an algorithm to invert a binary tree with an example demonstrating inversion of a sample binary tree.

  • Add an algorithm?
  • Fix a bug or typo in an existing algorithm?
  • 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".

@algorithms-keeper algorithms-keeper bot added the require tests Tests [doctest/unittest/pytest] are required label Oct 2, 2023
algorithms-keeper[bot]
algorithms-keeper bot reviewed Oct 2, 2023
View reviewed changes
Copy link

@algorithms-keeper algorithms-keeper bot left a comment

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Click here to look at the relevant links ⬇️

🔗 Relevant Links

Repository:

Python:

Automated review generated by algorithms-keeper. If there's any problem regarding this review, please open an issue about it.
algorithms-keeper commands and options

algorithms-keeper actions can be triggered by commenting on this PR:

  • @algorithms-keeper review to trigger the checks for only added pull request files
  • @algorithms-keeper review-all to trigger the checks for all the pull request files, including the modified files. As we cannot post review comments on lines not part of the diff, this command will post all the messages in one comment.

NOTE: Commands are in beta and so this feature is restricted only to a member or owner of the organization.

@algorithms-keeper algorithms-keeper bot added the awaiting reviews This PR is ready to be reviewed label Oct 2, 2023
@algorithms-keeper algorithms-keeper bot added the tests are failing Do not merge until tests pass label Oct 2, 2023
algorithms-keeper[bot]
algorithms-keeper bot reviewed Oct 2, 2023
View reviewed changes
Copy link

@algorithms-keeper algorithms-keeper bot left a comment

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Click here to look at the relevant links ⬇️

🔗 Relevant Links

Repository:

Python:

Automated review generated by algorithms-keeper. If there's any problem regarding this review, please open an issue about it.
algorithms-keeper commands and options

algorithms-keeper actions can be triggered by commenting on this PR:

  • @algorithms-keeper review to trigger the checks for only added pull request files
  • @algorithms-keeper review-all to trigger the checks for all the pull request files, including the modified files. As we cannot post review comments on lines not part of the diff, this command will post all the messages in one comment.

NOTE: Commands are in beta and so this feature is restricted only to a member or owner of the organization.

@algorithms-keeper algorithms-keeper bot removed the require tests Tests [doctest/unittest/pytest] are required label Oct 2, 2023
@algorithms-keeper algorithms-keeper bot removed the tests are failing Do not merge until tests pass label Oct 2, 2023
@gogouravr
Copy link
Contributor Author

@tianyizheng02 Please review this PR 🙏

@gogouravr
Copy link
Contributor Author

@tianyizheng02 Please review this PR.

@tianyizheng02
Copy link
Contributor

Inverting a binary tree appears to already be implemented in data_structures/binary_tree/binary_tree_mirror.py. However, this existing implementation uses a dict-based representation of a binary tree rather than a node-based representation, and I personally prefer this PR's implementation.

@cclauss, should we keep both implementations? Or should this one replace the existing implementation?

@cclauss cclauss changed the title Add Invert a Binary Tree solution Add Mirror a Binary Tree solution Oct 24, 2023
@algorithms-keeper algorithms-keeper bot added the require tests Tests [doctest/unittest/pytest] are required label Oct 24, 2023
algorithms-keeper[bot]
algorithms-keeper bot reviewed Oct 24, 2023
View reviewed changes
Copy link

@algorithms-keeper algorithms-keeper bot left a comment

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Click here to look at the relevant links ⬇️

🔗 Relevant Links

Repository:

Python:

Automated review generated by algorithms-keeper. If there's any problem regarding this review, please open an issue about it.
algorithms-keeper commands and options

algorithms-keeper actions can be triggered by commenting on this PR:

  • @algorithms-keeper review to trigger the checks for only added pull request files
  • @algorithms-keeper review-all to trigger the checks for all the pull request files, including the modified files. As we cannot post review comments on lines not part of the diff, this command will post all the messages in one comment.

NOTE: Commands are in beta and so this feature is restricted only to a member or owner of the organization.

cclauss
cclauss approved these changes Oct 24, 2023
View reviewed changes
Copy link
Member

@cclauss cclauss left a comment •
edited
Loading

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

I like the name mirror more than if you have a triangle shaped like:

  *
 ***
*****

then the inverted triangle has a shape:

*****
 ***
  *

When I stand on my head, I am inverted.
When I look in the mirror, left and right are swapped but top and bottom are not.

Given that this directory is data_structures I think that using a dict to represent a binary tree is a bit strange but let's keep both in place for now.

@algorithms-keeper algorithms-keeper bot removed the awaiting reviews This PR is ready to be reviewed label Oct 24, 2023
@cclauss cclauss merged commit 481aff7 into TheAlgorithms:master Oct 24, 2023
sedatguzelsemme pushed a commit to sedatguzelsemme/Python that referenced this pull request Sep 15, 2024
@gogouravr @pre-commit-ci
@cclauss @sedatguzelsemme
Add Mirror a Binary Tree solution (TheAlgorithms#9534)
0762566 
* Add `Invert a Binary Tree` solution

* Add type

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Add `doctest`

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Add `test` to `get_tree_inorder`

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Add `test` changes

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Fix lint errors

* Fix precommit errors

* Update and rename invert_binary_tree.py to mirror_binary_tree.py

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Christian Clauss <cclauss@me.com>
@isidroas isidroas mentioned this pull request Jan 25, 2025
Closed
14 tasks
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Reviewers

@algorithms-keeper algorithms-keeper[bot] algorithms-keeper[bot] left review comments

@cclauss cclauss cclauss approved these changes

Assignees
No one assigned
Labels
require tests Tests [doctest/unittest/pytest] are required
Projects
None yet
Milestone
No milestone
Development

Successfully merging this pull request may close these issues.
3 participants
@gogouravr @tianyizheng02 @cclauss