/Library/Developer/Toolchains/swift-tensorflow-RELEASE-0.11.xctoolchain/System/Library/PrivateFrameworks/LLDB.framework/Resources/Python/lldb$ otool -L _lldb.so | grep Python
/System/Library/Frameworks/Python.framework/Versions/2.7/Python (compatibility version 2.7.0, current version 2.7.16)
That is currently by choice because the default Python with MacOS was 2.7. We do want to move up to Python3 in nearish future. Is this causing issues for you?