Mozzicon: html/python implementation of https://github.com/cupcake/sigil

mozzicon.py

def mozzicon(md5):
  # Inspired by (!) https://github.com/cupcake/sigil

  # return a 5 by 5 grid of divs with horizontal plane of symmetry
  # (css used to rotate by 90deg)

  # md5 is a string like "9eadbe04ba0a832eecbd0a27f563e0a6"
  # use first char of hash to pick a color from 7
  colors = ('2d4fff', 'feb42c', 'e279ea', '1eb3fd', 'e84d41', '31cb73', '8d45aa', )

  fgcolor = "#%s" % colors[ ord(md5[0:2].decode("hex")) % 7 ]


  # use 4 chars/2 bytes of hash for 1's and 0's.
  # We want each byte as a string like "10010101" (padded to 8 chars)
  # and we throw away the last bit, yielding 3 rows of 5 "bits".
  
  # Take characters 3,4,5,6 and decode them to integers
  ints = md5[3:7].decode("hex")

  # turn each integer into a string of 1's and 0's of length 8
  binstrs = map(lambda x: bin(ord(x))[2:].rjust(8,"0"), ints)

  # join them together and just take 15 of them
  pixels = "".join(binstrs)[0:15]

  # symmetry: 1,2,3,2,1
  pixels += pixels[5:10]
  pixels += pixels[0:5]

  html = "".join(map(lambda x: "<div class='pixel%s'></div>" % (x, ), pixels))

  html = "<div class='mozzicon' style='background-color: %s;' title='%s'>%s</div>" % (fgcolor, md5, html)

  return mark_safe(html)