from itertools import groupby
num_list = [1, 5, 4, 3, 45, 45, 47, 1, 2, 2]
counts = [(v, len(list(c))) for v,c in groupby(sorted(num_list))]      # Create value-count pairs as list of tuples
for pair in counts:
    print('number',str(pair[0]),'appeared', str(pair[1]), 'time(s)')