1 2 3 4 5 6 7 8 9 10
output from huffman.py

1 01000
2 01001
3 0101
4 1100
5 1101
6 011
7 100
8 101
9 111
10 00


and from huffman.p
 codewords:
1        0.01818      5.8       5 00000
2        0.03636      4.8       5 00001
3        0.05455      4.2       4 0001
4        0.07273      3.8       4 1000
5        0.09091      3.5       4 1001
6        0.1091       3.2       3 001
7        0.1273       3.0       3 110
8        0.1455       2.8       3 111
9        0.1636       2.6       3 101
10       0.1818       2.5       2 01


huffman7.py is the best standalone program with built in counts.

huffman10.py is one that reads from standard input.