<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:

def make_multi_cols(self, num_class, name):
        '''make cols for multi-class predictions'''
        cols = ['c' + str(i) + '_' for i in xrange(num_class)]
        cols = map(lambda x: x + name, cols)
        return cols