How to write code to implement, UPGMA, WPGMA, and neighbor joining algorithms

How to implement, UPGMA, WPGMA, and neighbor joining algorithms?? I have this seq data:

data = {'A'    'ACTGGGCT'
        'B'   'CGTGAGCT'
        'C'   'ACTGTGCT'
        'D'   'ACTGTGAT'}

and this the distance matrix of pairwise alignment of these seqs:

>> distances=[0 17.6  22.7  15.9; 17.6  0  18  13.8; 22.7  18  0  21.4; 15.9  13.8  21.4 0]