'Fetches subplot corresponding to row/column'

def get_subplot(self, row, col):

    if ((row is not None) and (col is not None)):
        return self.subplots[int(row)][col]
    elif (row is not None):
        return self.subplots[int(row)]
    elif (col is not None):
        return self.subplots[int(col)]
    else:
        raise Exception((((u'row    and    col    were    none!' + str(row)) + u',    ') + str(col)))
