MNT: Add __repr__ method to Parachute class

[Gui-FernandesBR]

Pull request type

• Code changes (bugfix, features)
• Code maintenance (refactoring, formatting, tests)
• ReadMe, Docs and GitHub updates
• Other (please describe):

Checklist

• Tests for the changes have been added (if needed)
• Docs have been reviewed and added / updated
• Lint (black rocketpy/ tests/) has passed locally
• All tests (pytest --runslow) have passed locally
• CHANGELOG.md has been updated (if relevant)

Current behavior

Enter text here...

New behavior

This is useful for debugging or when you simply call Rocket.parachutes and want to see something more readable.

Breaking change

• Yes
• No

Additional information

Opening this now, can describe the PR later, sorry.

[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (a6dfea3) 71.05% compared to head (f4437d3) 70.91%.
Report is 11 commits behind head on develop.

❗ Current head f4437d3 differs from pull request most recent head 8def7ad. Consider uploading reports for the commit 8def7ad to get more accurate results

Files	Patch %	Lines
rocketpy/rocket/parachute.py	50.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #490      +/-   ##
===========================================
- Coverage    71.05%   70.91%   -0.14%     
===========================================
  Files           55       55              
  Lines         9261     9265       +4     
===========================================
- Hits          6580     6570      -10     
- Misses        2681     2695      +14     

Flag	Coverage Δ
unittests	70.91% <50.00%> (-0.14%)	⬇️

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[giovaniceotto]

@Gui-FernandesBR, I understand the usefullness of these codelines. However, I believe it would be a good practice to follow Python conventions for the __repr__ method, specially since this is mostly for dev use.

From https://docs.python.org/3/reference/datamodel.html#object.repr:

If at all possible, this should look like a valid Python expression that could be used to recreate an object with the same value (given an appropriate environment). If this is not possible, a string of the form <...some useful description...> should be returned.

Options are:

f"<Parachute(name={self.name}, cd_s={self.cd_s}, trigger={self.trigger}, sampling_rate={self.sampling_rate}, lag={self.lag}, noise={self.noise})>"

or, less verbose,

f"<Parachute name={self.name} (cd_s = {self.cd_s:.4f} m2, trigger = {self.trigger})>"

Look at https://stackoverflow.com/questions/44595218/python-repr-for-all-member-variables for more inspiration.