Fix length computation sympy

[marscher]

Changes

If we use the Integrate function in SymPy lambdify, we need to use "scipy" as method, "numpy" is not sufficient.
xref: sympy/sympy#20134

Related Issues

Closes #725

Checks

• updated CHANGELOG.rst
• updated tests
• updated doc/
• update example/tutorial notebooks
• update manifest file

[marscher]

note that the deepsource issues are unrelated to my changes :P

[marscher]

@vhirtham I've noticed, that using scipy as backend now triggers deprecation warnings like this:

DeprecationWarning: scipy.sin is deprecated and will be removed in SciPy 2.0.0, use numpy.sin instead

However we need to use scipy to make "Integrate" use the right backend. Do you have a suggestion how to proceed?

[marscher]

xref: sympy/sympy#20294

[codecov]

Codecov Report

Merging #770 (85dc858) into master (eac3ca0) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #770   +/-   ##
=======================================
  Coverage   96.77%   96.77%           
=======================================
  Files          88       88           
  Lines        6014     6017    +3     
=======================================
+ Hits         5820     5823    +3     
  Misses        194      194           

Impacted Files	Coverage Δ
weldx/core.py	93.41% <ø> (ø)
weldx/geometry.py	96.61% <100.00%> (+0.01%)	⬆️

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[github-actions]

Unit Test Results

2 153 tests  +1   2 153 ✔️ +1   2m 24s ⏱️ -11s
       1 suites ±0          0 💤 ±0 
       1 files   ±0          0 ❌ ±0 

Results for commit 85dc858. ± Comparison against base commit eac3ca0.

♻️ This comment has been updated with latest results.

[vhirtham]

note that the deepsource issues are unrelated to my changes :P

I silenced it for the future ;)

[vhirtham]

LGTM. Curious if this fixes some of the old computations issues I had.

[marscher]

Let me know if that helped with your old issues.

[CagtayFabry]

this looks great, nice find !