BlockMatrix with 1 matrix can be converted into regular matrix

[abhinav-anand-addepar]

Fixes #18618

• matrices
  • Fixed BlockDiagMatrix(A).blocks giving a non-block matrix.

[sympy-bot]

✅

Hi, I am the SymPy bot (v149). I'm here to help you write a release notes entry. Please read the guide on how to write release notes.

Your release notes are in good order.

Here is what the release notes will look like:

• matrices
  • Fixed BlockDiagMatrix(A).blocks giving a non-block matrix. (#18621 by @abhinav28071999)

This will be added to https://github.com/sympy/sympy/wiki/Release-Notes-for-1.6.

Note: This comment will be updated with the latest check if you edit the pull request. You need to reload the page to see it.

Click here to see the pull request description that was parsed.

Fixes #18618 

<!-- BEGIN RELEASE NOTES -->
* matrices
  * Fixed `BlockDiagMatrix(A).blocks` giving a non-block matrix.
<!-- END RELEASE NOTES -->

Update

The release notes on the wiki have been updated.

[codecov]

Codecov Report

Merging #18621 into master will decrease coverage by 0.001%.
The diff coverage is 100%.

@@              Coverage Diff              @@
##            master    #18621       +/-   ##
=============================================
- Coverage   75.585%   75.584%   -0.002%     
=============================================
  Files          644       644               
  Lines       167452    167452               
  Branches     39462     39462               
=============================================
- Hits        126570    126568        -2     
+ Misses       35364     35362        -2     
- Partials      5518      5522        +4

[oscarbenjamin]

Can you give the PR a better title? It is very unclear from the title what this does

[smichr]

In the release notes do you mean "one matrix" or "a matrix with one element"? I suspect the latter.