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### Describe your change: * [x] Add an algorithm? * [ ] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x]...

Erfaniaa

### Describe your change: * [x] Add an algorithm? * [ ] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x]...

alexpantyukhin

`mypy` produces errors when run on its own

5

### Feature description Apologies if I'm misunderstanding about how `mypy` is set up with this repo. `mypy` currently produces a litany of errors when run on its own even though...

tianyizheng02

Fixed flake8 failed test in select and pulled functions out of basic in genetic_algorithm, Fixes: #7971

1

### Describe your change: * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x]...

ThomasWaite03

Implement XGBoost classification and regression algorithms

4

### Feature description [machine_learning/xgboost_classifier.py](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/xgboost_classifier.py) and [machine_learning/xgboost_regressor.py](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/xgboost_regressor.py) are how-tos since they both just use an existing library for the actual ML algorithms. My understanding is that #7106 and #7107 were merged...

tianyizheng02

### Describe your change: * [x] Add an algorithm? * [ ] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x]...

Erfaniaa

Remove duplicate GCD implementation

1

### Feature description [`greatest_common_divisor.py`](https://github.com/TheAlgorithms/Python/blob/master/maths/greatest_common_divisor.py) and [`euclidean_gcd.py`](https://github.com/TheAlgorithms/Python/blob/master/maths/euclidean_gcd.py) both have basically the same two implementations of the Euclidean algorithm for calculating the GCD of 2 numbers. Thus, one of them should probably...

tianyizheng02

Segmented Sieve of Eratosthenes - Feature Request + Assignment Request

2

### Feature description I would like to implement segmented sieve of erathosthenes (and may be other variations of it). Please tell if you would merge that. And also let me...

faizan2700

Remove duplicate Collatz sequence implementation

1

### Feature description I think one of [`3n_plus_1.py`](https://github.com/TheAlgorithms/Python/blob/master/maths/3n_plus_1.py) and [`collatz_sequence.py`](https://github.com/TheAlgorithms/Python/blob/master/maths/collatz_sequence.py) should be removed, as they're nearly identical implementations of the same algorithm for computing Collatz sequences. I'm not sure which...

tianyizheng02

### Describe your change: * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x]...

Erfaniaa