checking if array equals an empty string during deconvolution

This line raises the following ValueError when stain_matrix is an array:

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

Change this line:

    stain_matrix = getattr(sys.modules[__name__], stain, "")

    if stain_matrix == "":

to check the truthy value instead:

    stain_matrix = getattr(sys.modules[__name__], stain, None)

    if stain_matrix:

choosehappy / HistoQC