text: # courbB08.pil PIL Font file uuencoded
  courB08_pil ="""eJztl91rFkcUxp+Zt7vGFYzVtiJKICgYlLRWkaBBVGgDraFGCH5gsQp+QMBqabAVRYJYAlakCkoh
  CpYgxaLkIu1NvLBeSAStglpqL6xQAsVe2AuL5u2buH3mzGaYPf9AKWTl8d3nl7MzZ2bnazvea9+9
  7+PurFWut5e0Zu+s7VybYfKavP7LK3X/5TlM4Q3/OWbyf1ARD/6mgb2SjwtPhbpnq0iKZ6ahrmCj
  wqbxdgamRnHOA69jimN5zvIS8cDcUEeVdYzRAw1FHcJYXgPvG4s6Jlgj7xeEequS3wLeNvGvnrEO
  tq+Jt82szT+b86+WHlgS2jHGuHF6YHnog1zaupxqCcy3t4X3rVG9iXhgjW+bsFQ80BaxRDywTrF1
  VId6toPaqOI2UlsV20ptV2w7tUuxXVSXYl3UvoIZ9kFFPPBJ6D/HLD3QXbwjyDjI6YHPiz5FXiN7
  SQ8cDu/N9/1h3veEOP/Oe6gvQnmuvYYe+NL3qYyNVDxw2seF8XKa+jrKJREPnFdx56l+xfqpS4pd
  ogZUeQPU91FcKh64GveBeOCaKu8adUM9e4O6reJuU/cUu0c9VM8+pB6r/B5TI+rZEerPUpyhB/6K
  5lsqHniuyntO1VR5Nb5CU86FHqZOsTqqXrF66o2ojlQ8zDwVN4+aX86FHqYpXg9YLeevWRzPc7LF
  ZG+V1wN6mKXxvMzH6GFaJua5zGNLD7MqmtNcc+hh1oT1oCb5cf6aNj92mbPMGXqY9jCPasLaqQ1h
  jMv8pYfZpOI2UR9GcYl4mB1RnMtvB9me8N583B5qb3mNoIf5NGJc1+hhPvPrrjybioc5op49Qh0L
  dfj8jlHHQ3s9O059Fc3zRDzMmVKcpYfpU+3oI/umxJyH+TYqLxUPc0X13xVqMMovFQ8zpPIbon6M
  WCoeZljVMUz9VIqz9DAP1Dt6QP0a9gpZ7+lhHhXjysreaOhhfiv1vaGH+T2Mv5rbU+hh/uAaOnlN
  Xv+Hy4/7mtv3OW5hnpTODIYe5mm0xqbiYf4OcbLv08NU1ZyuuqKLOEvm6sjhJkd8TjRustgkrO3u
  vFGjh60r1uyiPHrY6eH84tb7l/SwM8vrAT3snHgNY9wcsoby+Y8edn5UxxTxsIuitrlcFpG9GcVx
  /6CHXRrKk72MHrYl3stYB/ceu7I4X02wlWSrCmaF1ehhV7NrovWKHrattI4betj20Fc8r7E87kf2
  g+gcy32BHnZDfKZmHPco2xnl4vqlk2yz6r/N1EfRPpiKh90d7VGpeNi9inGPst2lNdbSwx4McS8k
  7iDVE/Ytz3qoXsV6qZOKnaTOBDYqjPuRPRfOkz7uHNUf4uQMQg/7XekMYulhB6JnE/GwP0T1JuJh
  ryrGM6G9HuWSiIcdDnPmhTs70sPeCuPes1vUXcXuUvcDGxV2n/olOisn4mEfhfOVby/3KDsSlZeI
  h32iGOe0faoY57R9ptgzajTKJREPOx7aJnOfHhUbxov0Mz0qU8v50aMyo/wu6VGZrdhsqqH8fnll
  HEEz4zj6DNMxK+4X+gyv8cszyoU+4zfmjNAO9zuXrNGXF1gj2ULFFpI1K9ZMtiww//22jGwFXg39
  535XkK0O+cl5gz7Du6iP5wd9hvfDs9LP9BnWR/U6tp6sU7FOsi1RLo5tIdsWled+t5HtVO3YSdal
  WBfZftW2/WQHVH4HyA6F9+GfPUR2VOV3lKxXsV6yE4qdIDul2Cmys6ptZ8n6Qi7+m7OP7ELoU/8t
  dIHsoo8L+V0ku6xyvkw2qNgg2VBgvg+GyK6XyrP0GW5ydE3EuXd5k+xOeOdVibtD9jNm/Qv15O4i"""
  
  
  
  # courbB08.pbm font file uuencoded
  courB08_pbm ="""eJxNkntM01cUx8+P2/1apUAZEpECq4KRjKhF0E55FYEp4yG6mglz2Q8Q1BhERhhls/zKI+CID4wb
  IAPKpk4GAzqZPKKMX2GIUwGJG+ImtKwKjIzXcGuBtncV0Hn+uLnn5Nzv55xv7mdRkbusVjquBACr
  0N3B+wCQi/m+ijAf4LGl/wgAiwkNDpRIyyABSjGkBQ/fa3c1bfLs4U8ulDcYUs/502rTpIlO9pyc
  Kp/Buql6f3rmZ1NqvpO2SZXf0duY3j0563zjoZpW8AvHRmVeZ/Co36mFR8bERzlsxOMJ+oJshsS5
  7rlfzFzmnZFEFnIEZjTGizgLsLzjl4QtrNprBRu10e+u9GgePHjG63bPDw/H87uix0Vtsvkqg9qO
  lUimPLiOM4z69YfqIu5Pa2Sr/io6n9Xmf9e+57W1Iapo4lLQBdLSWc/z3KOSlgznDXTW/Flh21kX
  IeUIX8FZVL9dwP4NBH5jglYxkBNFmWgMcfsAxM/9gEL5TTwYpnfElR8qQ+WiCgeTHOAfb2bW/cQC
  /FozFOOQzAebtjRvQLI7HBtXvaZe25a3Q/1vZpPa+kd1XXKuflr5Cm48YUsUcjMXjsm/sf+22s6z
  QAbGZ8mEXMzSE4y9AHhRpltwB1N9ynz5H2MOi0MEi4E5O1ov9ogrFU5cMWAcdgQb3xHFtFK+0pkh
  VnYWxltx92j69p6jJ9OnHr+Cq5x5X6Mz70JcX2tEG5LIShM4EHIGoLIRsHzcvEuGwMYA4DZPn7gP
  MA1QIgltnt82cTu7j5n76mmz3TU5Bh3PFRTHku52aBgaTnJD7m1c0a3hNjbWWjBtMsP/OFac/LYA
  NAAWepdYodB58NBFIuOjNSQ4cgXplqP2RyOe8fd999T8weqBRwLwNFdQobHgA1/YTV8PH+TwV59v
  Bo7Y1J4rmHFv3T9e8rmmXdGSuPpSbBnhYJ7V8ICz6AfGcdTpRkpCUU8WcOT8wb+dSHIb6QZapx0M
  Y2DO4i7jYV2AUNkkErpQFHVYmFRmYD7OJhDyQSiow4IkrS3TbpQqFA9slE4jnj6peXMTC+N8buJ2
  0Uv5eOothuGIiluyCDtff3miBzJHjncOIC3bPT8FLabRPd0TCWy346Mmn9Rz23WyNMJcsnqhQani
  3CMFOZuYU7c20zTNVqNbGPNxALWnybeLEcTvXWpc10leI5ae/CI9qBqI686cnO6P6F33e2vAp0nz
  9+hnbNeueh/261UJK5aVeSf73ZSXA7dOBXvkXODEb9hVww4KtPNAbPvaZbi0q9kICCl+CiBJSzLv
  a8TlntYlC4UHvCRTlaXOy13VAbN0eae2v3hNesWXLsWPkjfOPq7e6zd1fOfc1TckDaylrvleinnT
  8Ui87ScLMVhhEx7SUJ8U2zKrRR2Z1dEqZlkr7kDTuhFjpkvse9ZXN0R9H+DlYA4TXVm6/kXDQMyT
  eGnJFXlLlSgva5iLUEcbiyDzNqf4Wr9kKYVUIcY40DrnsW4E4zW9QxnHVYx+bo64mIskDWjZgCrq
  eVQFrS7Sh/uFLftIidKWbgj6Oq652d4c3v88Dw2JDK7bSWX/ByuaLZI="""
  
  
  
  
  class Code128:
  
     CharSetA =  {
                  ' ':0, '!':1, '"':2, '#':3, '$':4, '%':5, '&':6, "'":7,
                  '(':8, ')':9, '*':10, '+':11, ',':12, '-':13, '.':14, '/':15,
                  '0':16, '1':17, '2':18, '3':19, '4':20, '5':21, '6':22, '7':23,
                  '8':24, '9':25, ':':26, ';':27, '<':28, '=':29, '>':30, '?':31,
                  '@':32, 'A':33, 'B':34, 'C':35, 'D':36, 'E':37, 'F':38, 'G':39,
                  'H':40, 'I':41, 'J':42, 'K':43, 'L':44, 'M':45, 'N':46, 'O':47,
                  'P':48, 'Q':49, 'R':50, 'S':51, 'T':52, 'U':53, 'V':54, 'W':55,
                  'X':56, 'Y':57, 'Z':58, '[':59, '\\':60, ']':61, '^':62, '_':63,
                  '\x00':64, '\x01':65, '\x02':66, '\x03':67, '\x04':68, '\x05':69, '\x06':70, '\x07':71,
                  '\x08':72, '\x09':73, '\x0A':74, '\x0B':75, '\x0C':76, '\x0D':77, '\x0E':78, '\x0F':79,
                  '\x10':80, '\x11':81, '\x12':82, '\x13':83, '\x14':84, '\x15':85, '\x16':86, '\x17':87,
                  '\x18':88, '\x19':89, '\x1A':90, '\x1B':91, '\x1C':92, '\x1D':93, '\x1E':94, '\x1F':95,
                  'FNC3':96, 'FNC2':97, 'SHIFT':98, 'Code C':99, 'Code B':100, 'FNC4':101, 'FNC1':102, 'START A':103,
                  'START B':104, 'START C':105, 'STOP':106
             }
  
     CharSetB = {
                  ' ':0, '!':1, '"':2, '#':3, '$':4, '%':5, '&':6, "'":7,
                  '(':8, ')':9, '*':10, '+':11, ',':12, '-':13, '.':14, '/':15,
                  '0':16, '1':17, '2':18, '3':19, '4':20, '5':21, '6':22, '7':23,
                  '8':24, '9':25, ':':26, ';':27, '<':28, '=':29, '>':30, '?':31,
                  '@':32, 'A':33, 'B':34, 'C':35, 'D':36, 'E':37, 'F':38, 'G':39,
                  'H':40, 'I':41, 'J':42, 'K':43, 'L':44, 'M':45, 'N':46, 'O':47,
                  'P':48, 'Q':49, 'R':50, 'S':51, 'T':52, 'U':53, 'V':54, 'W':55,
                  'X':56, 'Y':57, 'Z':58, '[':59, '\\':60, ']':61, '^':62, '_':63,
                  '' :64, 'a':65, 'b':66, 'c':67, 'd':68, 'e':69, 'f':70, 'g':71,
                  'h':72, 'i':73, 'j':74, 'k':75, 'l':76, 'm':77, 'n':78, 'o':79,
                  'p':80, 'q':81, 'r':82, 's':83, 't':84, 'u':85, 'v':86, 'w':87,
                  'x':88, 'y':89, 'z':90, '{':91, '|':92, '}':93, '~':94, '\x7F':95,
                  'FNC3':96, 'FNC2':97, 'SHIFT':98, 'Code C':99, 'FNC4':100, 'Code A':101, 'FNC1':102, 'START A':103,
                  'START B':104, 'START C':105, 'STOP':106
             }
  
     CharSetC = {
                  '00':0, '01':1, '02':2, '03':3, '04':4, '05':5, '06':6, '07':7,
                  '08':8, '09':9, '10':10, '11':11, '12':12, '13':13, '14':14, '15':15,
                  '16':16, '17':17, '18':18, '19':19, '20':20, '21':21, '22':22, '23':23,
                  '24':24, '25':25, '26':26, '27':27, '28':28, '29':29, '30':30, '31':31,
                  '32':32, '33':33, '34':34, '35':35, '36':36, '37':37, '38':38, '39':39,
                  '40':40, '41':41, '42':42, '43':43, '44':44, '45':45, '46':46, '47':47,
                  '48':48, '49':49, '50':50, '51':51, '52':52, '53':53, '54':54, '55':55,
                  '56':56, '57':57, '58':58, '59':59, '60':60, '61':61, '62':62, '63':63,
                  '64':64, '65':65, '66':66, '67':67, '68':68, '69':69, '70':70, '71':71,
                  '72':72, '73':73, '74':74, '75':75, '76':76, '77':77, '78':78, '79':79,
                  '80':80, '81':81, '82':82, '83':83, '84':84, '85':85, '86':86, '87':87,
                  '88':88, '89':89, '90':90, '91':91, '92':92, '93':93, '94':94, '95':95,
                  '96':96, '97':97, '98':98, '99':99, 'Code B':100, 'Code A':101, 'FNC1':102, 'START A':103,
                  'START B':104, 'START C':105, 'STOP':106
             }
  
  
     ValueEncodings = {  0:'11011001100',  1:'11001101100',  2:'11001100110',
          3:'10010011000',  4:'10010001100',  5:'10001001100',
          6:'10011001000',  7:'10011000100',  8:'10001100100',
          9:'11001001000', 10:'11001000100', 11:'11000100100',
          12:'10110011100', 13:'10011011100', 14:'10011001110',
          15:'10111001100', 16:'10011101100', 17:'10011100110',
          18:'11001110010', 19:'11001011100', 20:'11001001110',
          21:'11011100100', 22:'11001110100', 23:'11101101110',
          24:'11101001100', 25:'11100101100', 26:'11100100110',
          27:'11101100100', 28:'11100110100', 29:'11100110010',
          30:'11011011000', 31:'11011000110', 32:'11000110110',
          33:'10100011000', 34:'10001011000', 35:'10001000110',
          36:'10110001000', 37:'10001101000', 38:'10001100010',
          39:'11010001000', 40:'11000101000', 41:'11000100010',
          42:'10110111000', 43:'10110001110', 44:'10001101110',
          45:'10111011000', 46:'10111000110', 47:'10001110110',
          48:'11101110110', 49:'11010001110', 50:'11000101110',
          51:'11011101000', 52:'11011100010', 53:'11011101110',
          54:'11101011000', 55:'11101000110', 56:'11100010110',
          57:'11101101000', 58:'11101100010', 59:'11100011010',
          60:'11101111010', 61:'11001000010', 62:'11110001010',
          63:'10100110000', 64:'10100001100', 65:'10010110000',
          66:'10010000110', 67:'10000101100', 68:'10000100110',
          69:'10110010000', 70:'10110000100', 71:'10011010000',
          72:'10011000010', 73:'10000110100', 74:'10000110010',
          75:'11000010010', 76:'11001010000', 77:'11110111010',
          78:'11000010100', 79:'10001111010', 80:'10100111100',
          81:'10010111100', 82:'10010011110', 83:'10111100100',
          84:'10011110100', 85:'10011110010', 86:'11110100100',
          87:'11110010100', 88:'11110010010', 89:'11011011110',
          90:'11011110110', 91:'11110110110', 92:'10101111000',
          93:'10100011110', 94:'10001011110', 95:'10111101000',
          96:'10111100010', 97:'11110101000', 98:'11110100010',
          99:'10111011110',100:'10111101110',101:'11101011110',
          102:'11110101110',103:'11010000100',104:'11010010000',
          105:'11010011100',106:'11000111010'
                          }
  
  
  
     def makeCode(self, code):
        """ Create the binary code
        return a string which contains "0" for white bar, "1" for black bar """
  
        current_charset = None
        pos=sum=0
        skip=False
        for c in range(len(code)):
            if skip:
                skip=False
                continue
  
            #Only switch to char set C if next four chars are digits
            if len(code[c:]) >=4 and code[c:c+4].isdigit() and current_charset!=self.CharSetC or \
               len(code[c:]) >=2 and code[c:c+2].isdigit() and current_charset==self.CharSetC:
               #If char set C = current and next two chars ar digits, keep C
               if current_charset!=self.CharSetC:
                   #Switching to Character set C
                   if pos:
                       strCode += self.ValueEncodings[current_charset['Code C']]
                       sum  += pos * current_charset['Code C']
                   else:
                       strCode= self.ValueEncodings[self.CharSetC['START C']]
                       sum = self.CharSetC['START C']
                   current_charset= self.CharSetC
                   pos+=1
            elif self.CharSetB.has_key(code[c]) and current_charset!=self.CharSetB and \
                 not(self.CharSetA.has_key(code[c]) and current_charset==self.CharSetA):
               #If char in chrset A = current, then just keep that
               # Switching to Character set B
               if pos:
                   strCode += self.ValueEncodings[current_charset['Code B']]
                   sum  += pos * current_charset['Code B']
               else:
                   strCode= self.ValueEncodings[self.CharSetB['START B']]
                   sum = self.CharSetB['START B']
               current_charset= self.CharSetB
               pos+=1
            elif self.CharSetA.has_key(code[c]) and current_charset!=self.CharSetA and \
                 not(self.CharSetB.has_key(code[c]) and current_charset==self.CharSetB):
               # if char in chrset B== current, then just keep that
               # Switching to Character set A
               if pos:
                   strCode += self.ValueEncodings[current_charset['Code A']]
                   sum  += pos * current_charset['Code A']
               else:
                   strCode += self.ValueEncodings[self.CharSetA['START A']]
                   sum = self.CharSetA['START A']
               current_charset= self.CharSetA
               pos+=1
  
            if current_charset==self.CharSetC:
               val= self.CharSetC[code[c:c+2]]
               skip=True
            else:
               val=current_charset[code[c]]
  
            sum += pos * val
            strCode += self.ValueEncodings[val]
            pos+=1
  
        #Checksum
        checksum= sum % 103
  
        strCode +=  self.ValueEncodings[checksum]
  
        #The stop character
        strCode += self.ValueEncodings[current_charset['STOP']]
  
        #Termination bar
        strCode += "11"
  
        return strCode
  
  
     def getImage(self, value, height = 50, extension = "PNG", path = "/"):
        """ Get an image with PIL library
        value code barre value
        height height in pixel of the bar code
        extension image file extension"""
        from PIL import Image, ImageFont, ImageDraw
        from string import lower, upper
  
        # Create a missing font file
        decodeFontFile(courB08_pil ,path+"courB08.pil")
        decodeFontFile(courB08_pbm ,path+"courB08.pbm")
  
        # Get the bar code list
        bits = self.makeCode(value)
  
        # Create a new image
        position = 8
        im = Image.new("1",(len(bits)+position,height))
  
        # Load font
        font = ImageFont.load(path+"courB08.pil")
  
        # Create drawer
        draw = ImageDraw.Draw(im)
  
        # Erase image
        draw.rectangle(((0,0),(im.size[0],im.size[1])),fill=256)
  
        # Draw text
        draw.text((23, height-9), value, font=font, fill=0)
  
        # Draw the bar codes
        for bit in range(len(bits)):
           if bits[bit] == '1':
              draw.rectangle(((bit+position,0),(bit+position,height-10)),fill=0)
  
        # Save the result image
        im.save(path+value+"."+lower(extension), upper(extension))
        return im
  
  
  def decodeFontFile(data, file):
     """ Decode font file embedded in this script and create file """
     from zlib import decompress
     from base64 import decodestring
     from os.path import exists
  
     # If the font file is missing
     if not exists(file):
        # Write font file
        open (file, "wb").write(decompress(decodestring(data)))
  
  def testWithChecksum():
     """ Test bar code with checksum """
     bar = Code128()
     assert(bar.makeCode('HI345678')=='11010010000110001010001100010001010111011110100010110001110001011011000010100100001001101100011101011')
  
  def testImage():
     """ Test images generation with PIL """
     bar = Code128()
     bar.getImage("9782212110708",50,"gif")
     bar.getImage("978221211070",50,"png")
  
  def test():
     """ Execute all tests """
     testWithChecksum()
     testImage()
  
  if __name__ == "__main__":
     test()