Pyfftw Multithreading Not Working

I am running my codes based on PyFFTW wrapper for FFTW3 library. In the plan function call of PyFFTW, there is a parameter 'thread' to specify the number of threads to use. I use a

Solution 1:

The argument is threads not thread. Superfluous and invalid arguments should probably be picked up. Fancy going and leaving an issue on github?