PYQR - A pure Python QR-Code Generator
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Author : Hans Christian von Stockhausen [hc at vst dot io]
Date   : 2010-08-09
Web    : http://QR-CODE.co.za
         http://twitter.com/photocode
         http://github.com/hcvst/pyqr
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This is a pre alpha release /!\

One can generate the following codes: 1-M, 1-H, 2-L, 3-L 
Alphanumeric and binary encoding are supported. Note, that alphanumeric mode is 
NOT casesensitive.

EXAMPLES
========
To save a qr code to file.
>>> import qrcode
>>> qrc = qrcode.QRCode() 
>>> qrc.encode("HTTP://QR-CODE.CO.ZA") 
>>> img = qrc.to_image()
>>> img.save('./code.png')

To display a qr code as text. 
>>> import qrcode
>>> qrc = qrcode.QRCode() 
>>> qrc.encode("HTTP://QR-CODE.CO.ZA")
>>> s = qrc.to_string(on='g') # g rendered as black box when font set to Webdings
>>> print(s)

TODO
====
* update testcases
* clean up, refactor rewrite
  * validate input lengths
  * encapsule the various specification tables
  * look into the bitlist helper
  * use appends instead of concats with lists
* make code more robust or at least crash rather than producing garbage
* optimal mask selection (currently 011 is used)
* add support for version > 3
* automatically select version that best fits data if none specified
* add support for microqr

LIMITATIONS
===========
Too many to list

KNOWN ISSUES
============
Generating a 1-M for too long input results in a code that crashes the Android barcode
scanner. Probably due to some incorrect padding (0000 and 236,17) on my side.


COPYRIGHT & LICENSE
===================
The file ffield.py is copyright Emin Martinian, 2002. See ffield.py for license terms.
All other files are copyright Hans Christian von Stockhausen, 2010. See LICENSE file for terms.