Fixed an issue where matplotlib was not required to install dymos without specifications but would fail to import. #1035
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Summary
There were some "bare" imports of matplotlib in the dymos source code that would be executed when
import dymoswas invoked. Since basic dymos usage doesn't require matplotlib, it was not listed as a prerequisite except when a modifier likepip install dymos[tests]were used.These bare imports have been moved into more local scopes where they will cause import errors if those particular methods or functions are invoked, but importing dymos will proceed without issue.
Related Issues
Backwards incompatibilities
None
New Dependencies
None