Output the minimum value in an adjacency matrix, along with a list of row and column IDs for that minimum value

minSeqIdLister.py

#!/usr/bin/env python

import sys

fn = sys.stdin

ids = list()
vd = dict()
rowIdx = -1

for line in fn:
    vals = line.strip("\n\t").split("\t")
    if rowIdx == -1:
        ids = vals
    else:
        yid = vals[0]
        vals.pop(0)
        for colIdx in xrange(len(vals)):
            xid = ids[colIdx]
            val = float(vals[colIdx])
            if val > 0.0 and val not in vd.keys():
                vd[val] = list()
            if val > 0.0:
                vd[val].append([xid, yid])
    rowIdx += 1

print min(vd), vd[min(vd)]