Removed unnecessary commas

[JonCrisX]

    141         # Prepare Data ---------------------------------------------------------
    142         if (exp_array.sum(0) == 0).sum() > 0:
--> 143             warnings.warn(
    144                 "Some columns in the exp_array contains all zero values, ",
    145                 "which often causes trouble in inference. Please consider ",

TypeError: 'str' object cannot be interpreted as an integer

[haozhu233]

Oh, that's right! Thanks for the fix!