feat: add rpsd method to MapdlGrpc for variable retrieval as an array

[germa89]

Description

As the title.

It allows to do:

>>> arr = mapdl.rpsd(3, 2, "", 1, 2)
>>> print(arr)
array([[5.75589860e-06],
       [5.79347209e-06],
       [5.86774837e-06],
       [5.98084878e-06]
...

Issue linked

Related to #3865 so we can facilitate PSD related works.

Checklist

• I have visited and read Develop PyMAPDL.
• I have tested my changes locally
• I have added necessary documentation or updated existing documentation.
• I have followed the PyMAPDL coding style guidelines.
• I have added appropriate unit tests that also ensure the minimal coverage criteria.
• I have reviewed my changes before submitting this pull request.
• I have linked the issue or issues that are solved to the PR if any.
• I have assigned this PR to myself.
• I have marked this PR as draft if it is not ready to be reviewed yet.
• I have made sure that the title of my PR follows Commit naming conventions (e.g. feat: adding new MAPDL command)

[ansys-reviewer-bot]

Thanks for opening a Pull Request. If you want to perform a review write a comment saying:

@ansys-reviewer-bot review

[sourcery-ai]

Reviewer's Guide

Adds an rpsd wrapper in MapdlGrpc to retrieve power spectral density variables as numpy arrays, alongside a dedicated pytest fixture and unit test to validate the new functionality.

Class diagram for the new rpsd method in MapdlGrpc

classDiagram
    class MapdlBase {
        +rpsd(ir, ia, ib, itype, datum, name, signif, **kwargs)
    }
    class MapdlGrpc {
        +rpsd(ir, ia, ib, itype, datum, name, signif, **kwargs) NDArray[np.float64]
        +vget(varname, index)
    }
    MapdlGrpc --|> MapdlBase
    MapdlGrpc : +rpsd overrides MapdlBase.rpsd
    MapdlGrpc : +rpsd returns numpy array

Loading

File-Level Changes

Change	Details	Files
Implement rpsd method in MapdlGrpc to return array data	Added rpsd signature matching MapdlBase.rpsd Invoked super().rpsd with all parameters Returned results via self.vget("_temp", ir)	src/ansys/mapdl/core/mapdl_grpc.py
Add unit test for the rpsd command	Entered post26() mode before PSD retrieval Called mapdl.rpsd and asserted output is numpy.ndarray Checked output shape for expected dimensions	tests/test_mapdl.py
Introduce psd_analysis fixture for PSD setup in tests	Defined psd_analysis fixture with scope 'function' Imported vmfiles["vm203"] for example input Applied mapdl.input(vmfiles["vm203"]) to initialize PSD analysis	tests/conftest.py

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[Copilot]

Pull Request Overview

This PR adds a new rpsd method to the MapdlGrpc class that wraps the MAPDL RPSD command and returns the result as a numpy array, making it more convenient for Python users to work with power spectral density analysis results.

• Adds rpsd method wrapper to MapdlGrpc class that returns numpy arrays instead of raw MAPDL output
• Includes test coverage with a PSD analysis fixture
• Follows the established pattern of other wrapped methods like esol

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
src/ansys/mapdl/core/mapdl_grpc.py	Adds the rpsd method wrapper that calls the parent method and returns results via vget
tests/conftest.py	Adds psd_analysis fixture using vm203 example for testing
tests/test_mapdl.py	Adds test case for the new rpsd method

[sourcery-ai]

Hey @germa89 - I've reviewed your changes and they look great!

Prompt for AI Agents

Please address the comments from this code review:
## Individual Comments

### Comment 1
<location> `src/ansys/mapdl/core/mapdl_grpc.py:3294` </location>
<code_context>
         return self.vget("_temp", nvar)

+    @wraps(MapdlBase.rpsd)
+    def rpsd(
+        self,
+        ir: str = "",
+        ia: str = "",
+        ib: str = "",
+        itype: int | str = "",
+        datum: int | str = "",
+        name: str = "",
+        signif: str = "",
+        **kwargs,
+    ) -> NDArray[np.float64]:
+        """Wraps RPSD to return the variable as an array."""
</code_context>

<issue_to_address>
Default argument values may not align with expected RPSD usage.

Defaulting 'itype' and 'datum' to empty strings, despite their int | str type hints, may lead to type errors. Using None as the default and handling type checks inside the method is recommended.
</issue_to_address>

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.40%. Comparing base (f021ab2) to head (7dc051b).
Report is 8 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4114   +/-   ##
=======================================
  Coverage   91.39%   91.40%           
=======================================
  Files         189      189           
  Lines       15667    15671    +4     
=======================================
+ Hits        14319    14324    +5     
+ Misses       1348     1347    -1     

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[germa89]

@pyansys-ci-bot LGTM.

[pyansys-ci-bot]

✅ Approving this PR because germa89 said so in here 😬