# -*- coding: utf-8 -*-
#
# python 2.7
fp1 = file('', 'r')
fp2 = file('', 'r')
fp3 = file('', 'w')
d1 = {}
d2 = {}
isFirst = True
for line in fp1:
if not isFirst:
d1[hash(line)] = line
else:
isFirst = False
fp1.close()
isFirst = True
for line in fp2:
if not isFirst:
d2[hash(line)] = line
else:
isFirst = False
fp2.close()
diff = set(d1.keys()) - set(d2.keys())
for key in diff:
fp3.write(d1[key])
fp3.close()
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