Use of 'is' for non-object.

[gbartlet]

Minor, but keeps popping up in tooling we're doing:

In matrixprofile/matrixProfile.py the use of is (instead of ==) to compare n_threads to non-object -1 prompts SyntaxWarning: "is" with a literal.

[vanbenschoten]

Hi @gbartlet! It might be worth checking out the new "matrixprofile" python library, which has better syntax (and performance, tooling, etc :)