ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all()

[yyoshiaki]

I'm useing numpy 1.13.1 and the error written in the title occured in slalom/ipynb/f-scLVM_Tcells.ipynb. Tentatively I replaced if cols == None: into if cols != SP.ndarray: in the line 147 of utils.py and it worked.