Python/ Pickling: Python Challenge 5

from StringIO import *
import pickle as pickle

f = open("peak.pickle","rb")
bin_data = f.read()
sio = StringIO(bin_data)
graph_data = pickle.load(sio)
for a in graph_data:
    line = " "
    for b in a:
        part = str(b[0]*b[1])
        line = line + part
    print line