I has the similar issue.
Adding this line
os.add_dll_directory( r"c:\Program Files\mingw-w64\x86_64-8.1.0-posix-seh-rt_v6-rev0\mingw64\bin" )
(path to g++ dlls) made the code work in jupyter.
I has the similar issue.
Adding this line
os.add_dll_directory( r"c:\Program Files\mingw-w64\x86_64-8.1.0-posix-seh-rt_v6-rev0\mingw64\bin" )
(path to g++ dlls) made the code work in jupyter.