import hashlib
def geohash(latitude, longitude, datedow):
'''Compute geohash() in http://xkcd.com/426/
>>> geohash(37.421542, -122.085589, b'2005-05-26-10458.68')
37.857713 -122.544543
'''
h = hashlib.md5(datedow).hexdigest()
p, q = [('%f' % float.fromhex('0.' + x)) for x in (h[:16], h
[16:32])]
print('%d%s %d%s' % (latitude, p[1:], longitude, q[1:]))
if __name__ == '__main__':
import doctest
doctest.testmod()
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