qrpy

*image generated by qrpy*

Context:

This was originally just built for a school projet, not meant to be a real python library. However, as i really liked to develop it, it has grown larger than expected.

Advantages :

Also, I think that this library has some advantages:

You can directly retrieve the pillow image object : .Im (for example to be able to modify it without having to save it locally).
You can directly retrieve the numpy array of the Qr code: .matrix
The qr.csv table and the constants FORMATBITS, VERSIONBITS and MASKS, gather all the information necessary to build a Qr code. So feel free to use it instead of searching the internet for hours as I did.

Limitations :

As the development is not very advanced, they are limitations to it, including (non-exhaustive):

Mask 4 seems broken, should be fixed soon
Not all versions have been tested, versions > 10 seems broken, have to find out where the error comes from
The qr code version is not automatically determined, so it must be chosen according to the data length. This is the very next feature.
The mask is not automatically determined.

How to use:

import Qr  
#To create a qr which contains 'github.com/nohehf/qrpy':  
qr = Qr(  
'github.com/nohehf/qrpy',  
mask=0,  
forceVersion=2,  
errorCorrectionLevel='L')  
qr.save(path) #saves the image to the specified path

qr.Im #The pillow Image of the Qr  
qr.matrix #The numpy array of the Qr  
qr.finalBits #The raw bits string encoded in the Qr, including error correction

Current version: v0

This version was realeasd now only because of my school project's deadline. This version is not production ready ! It lacks several features, and has a few bugs. Also, there is no real install at the moment, appart from cloning the repo, or dowloading it's archive.

Roadmap:

Planned additions:

Proper error handling
Auto version determination
Add scale parameter to the .save() method, to scale up the image.
.show() method to display the qr, in console or pop-up
Switch the "version" from dictionary to an object
Three methods of qr creation, .fromData(), .fromBytes() & .fromArray() to be able to create a qr code from those three datatypes
Add the other data formats
Auto mask determination