Added algorithm for Group Anagram

[shreyasharma6602]

Describe your change:

• 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 have a URL in its comments that points to Wikipedia or other similar explanation.
• If this pull request resolves one or more open issues then the commit message contains

Fixes: #6527 .

[algorithms-keeper]

Click here to look at the relevant links ⬇️

🔗 Relevant Links

Repository:

• Contributing guidelines
• Project Euler solution guidelines

Python:

• Formatted string literals (f-strings)
• Type hints
• doctest
• unittest
• pytest

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[yashgosa]

hey @shreyasharma6602 I am facing the issue of requires doctest can you please help me out ? what is doctest?

[shreyasharma6602]

hey @shreyasharma6602 I am facing the issue of requires doctest can you please help me out ? what is doctest?

Doctest is a module which is used for better testing purpose. You can try to implement it from these links.
Doctest
Doctest Python Documentation

[yashgosa]

thanks @shreyasharma6602

[cclauss]

What a terrible title for a pull request. The title should explain what the PR does and the issue number should be in the commit message so the reader can click on it.

[cclauss]

Please read CONTRIBUTING.md.

Hacktoberfest is strenuous for our team of active volunteer maintainers. That small team now has 200+ open pull requests to review. We have high standards for our submissions which are described in CONTRIBUTING.md. Our continuous integration tests help to ensure that our standards are met before we review and merge deserving pull requests. This is further complicated by the fact that we already have lots of algorithms and would like to avoid duplicates.

For these reasons, I will close all open pull requests failing tests so that our unpaid team has a smaller mountain to climb. If you want us to land your pull request, please read CONTRIBUTING.md carefully and try again.