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A framework for single/multi-objective optimization with metaheuristics

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Good Morning! Congratulations on working with the jMetalPy framework. I would like to suggest two parameters for the "observer" "WriteFrontToFileObserver": 1. step = int, to record the function values ​​only...

type: Addition

What is the reason for the duplicated documents? I just fixed the branch name in both of them, but I'm still wondering why.

This helps with statical analysis tools like mypy or flake8.

```python File "C:\Users\ricky\Desktop\ricky_s_lib\tests\jmetal_wrapper\optimize.py", line 69, in optimize algo.run() File "D:\software\miniconda\lib\site-packages\jmetal\core\algorithm.py", line 86, in run self.step() File "D:\software\miniconda\lib\site-packages\jmetal\core\algorithm.py", line 146, in step offspring_population = self.reproduction(mating_population) File "D:\software\miniconda\lib\site-packages\jmetal\algorithm\singleobjective\genetic_algorithm.py", line 93, in reproduction...

On pypi.org the 1.5.7 release seems missing: https://pypi.org/project/jmetalpy/#history. 1.5.5 and 1.6.0 are there.

Hello, I want run OMOPSO in parallel using multi-process, and the code looks like ``` problem = ZDT1() mutation_probability = 1.0 / problem.number_of_variables max_evaluations = 25000 swarm_size = 100 algorithm...

Class ``Problem`` in jMetalPy has the following constructor: ``` python def __init__(self): self.number_of_variables: int = 0 self.number_of_objectives: int = 0 self.number_of_constraints: int = 0 self.reference_front: List[S] = [] self.directions: List[int]...

type: Discussion

I wanted to add a termination criterion, so I created StoppingByEarlyStopping. The termination criterion is to stop when the objective value has not been updated more than a specified number...

Fix for **TypeError** as described in issue #147