basabuuka_prototyp/venv/lib/python3.5/site-packages/qrcode-6.0.dist-info/DESCRIPTION.rst

=============================
Pure python QR Code generator
=============================

Generate QR codes.

For a standard install (which will include pillow_ for generating images),
run::

    pip install qrcode[pil]

.. _pillow: https://pypi.python.org/pypi/Pillow


What is a QR Code?
==================

A Quick Response code is a two-dimensional pictographic code used for its fast
readability and comparatively large storage capacity. The code consists of
black modules arranged in a square pattern on a white background. The
information encoded can be made up of any kind of data (e.g., binary,
alphanumeric, or Kanji symbols)

Usage
=====

From the command line, use the installed ``qr`` script::

    qr "Some text" > test.png

Or in Python, use the ``make`` shortcut function:

.. code:: python

    import qrcode
    img = qrcode.make('Some data here')

Advanced Usage
--------------

For more control, use the ``QRCode`` class. For example:

.. code:: python

    import qrcode
    qr = qrcode.QRCode(
        version=1,
        error_correction=qrcode.constants.ERROR_CORRECT_L,
        box_size=10,
        border=4,
    )
    qr.add_data('Some data')
    qr.make(fit=True)

    img = qr.make_image(fill_color="black", back_color="white")

The ``version`` parameter is an integer from 1 to 40 that controls the size of
the QR Code (the smallest, version 1, is a 21x21 matrix).
Set to ``None`` and use the ``fit`` parameter when making the code to determine
this automatically.

``fill_color`` and ``back_color`` can change the background and the painting
color of the QR, when using the default image factory.

The ``error_correction`` parameter controls the error correction used for the
QR Code. The following four constants are made available on the ``qrcode``
package:

``ERROR_CORRECT_L``
    About 7% or less errors can be corrected.
``ERROR_CORRECT_M`` (default)
    About 15% or less errors can be corrected.
``ERROR_CORRECT_Q``
    About 25% or less errors can be corrected.
``ERROR_CORRECT_H``.
    About 30% or less errors can be corrected.

The ``box_size`` parameter controls how many pixels each "box" of the QR code
is.

The ``border`` parameter controls how many boxes thick the border should be
(the default is 4, which is the minimum according to the specs).

Other image factories
=====================

You can encode as SVG, or use a new pure Python image processor to encode to
PNG images.

The Python examples below use the ``make`` shortcut. The same ``image_factory``
keyword argument is a valid option for the ``QRCode`` class for more advanced
usage.

SVG
---

You can create the entire SVG or an SVG fragment. When building an entire SVG
image, you can use the factory that combines as a path (recommended, and
default for the script) or a factory that creates a simple set of rectangles.

From your command line::

    qr --factory=svg-path "Some text" > test.svg
    qr --factory=svg "Some text" > test.svg
    qr --factory=svg-fragment "Some text" > test.svg

Or in Python:

.. code:: python

    import qrcode
    import qrcode.image.svg

    if method == 'basic':
        # Simple factory, just a set of rects.
        factory = qrcode.image.svg.SvgImage
    elif method == 'fragment':
        # Fragment factory (also just a set of rects)
        factory = qrcode.image.svg.SvgFragmentImage
    else:
        # Combined path factory, fixes white space that may occur when zooming
        factory = qrcode.image.svg.SvgPathImage

    img = qrcode.make('Some data here', image_factory=factory)

Two other related factories are available that work the same, but also fill the
background of the SVG with white::

    qrcode.image.svg.SvgFillImage
    qrcode.image.svg.SvgPathFillImage


Pure Python PNG
---------------

Install the following two packages::

    pip install git+git://github.com/ojii/pymaging.git#egg=pymaging
    pip install git+git://github.com/ojii/pymaging-png.git#egg=pymaging-png

From your command line::

    qr --factory=pymaging "Some text" > test.png

Or in Python:

.. code:: python

    import qrcode
    from qrcode.image.pure import PymagingImage
    img = qrcode.make('Some data here', image_factory=PymagingImage)

==========
Change log
==========

6.0 (23 March 2018)
===================

- Fix optimize length being ignored in ``QRCode.add_data``.

- Better calculation of the best mask pattern and related optimizations. Big
  thanks to cryptogun!


5.3 (18 May 2016)
=================

* Fix incomplete block table for QR version 15. Thanks Rodrigo Queiro for the
  report and Jacob Welsh for the investigation and fix.

* Avoid unnecessary dependency for non MS platforms, thanks to Noah Vesely.

* Make ``BaseImage.get_image()`` actually work.


5.2 (25 Jan 2016)
=================

* Add ``--error-correction`` option to qr script.

* Fix script piping to stdout in Python 3 and reading non-UTF-8 characters in
  Python 3.

* Fix script piping in Windows.

* Add some useful behind-the-curtain methods for tinkerers.

* Fix terminal output when using Python 2.6

* Fix terminal output to display correctly on MS command line.

5.2.1
-----

* Small fix to terminal output in Python 3 (and fix tests)

5.2.2
-----

* Revert some terminal changes from 5.2 that broke Python 3's real life tty
  code generation and introduce a better way from Jacob Welsh.


5.1 (22 Oct 2014)
=================

* Make ``qr`` script work in Windows. Thanks Ionel Cristian Mărieș

* Fixed print_ascii function in Python 3.

* Out-of-bounds code version numbers are handled more consistently with a
  ValueError.

* Much better test coverage (now only officially supporting Python 2.6+)


5.0 (17 Jun 2014)
=================

* Speed optimizations.

* Change the output when using the ``qr`` script to use ASCII rather than
  just colors, better using the terminal real estate.

* Fix a bug in passing bytecode data directly when in Python 3.

* Substation speed optimizations to best-fit algorithm (thanks Jacob Welsh!).

* Introduce a ``print_ascii`` method and use it as the default for the ``qr``
  script rather than ``print_tty``.

5.0.1
-----

* Update version numbers correctly.


4.0 (4 Sep 2013)
================

* Made qrcode work on Python 2.4 - Thanks tcely.
  Note: officially, qrcode only supports 2.5+.

* Support pure-python PNG generation (via pymaging) for Python 2.6+ -- thanks
  Adam Wisniewski!

* SVG image generation now supports alternate sizing (the default box size of
  10 == 1mm per rectangle).

* SVG path image generation allows cleaner SVG output by combining all QR rects
  into a single path. Thank you, Viktor Stískala.

* Added some extra simple SVG factories that fill the background white.

4.0.1
-----

* Fix the pymaging backend not able to save the image to a buffer. Thanks ilj!

4.0.2
-----

* Fix incorrect regex causing a comma to be considered part of the alphanumeric
  set.

* Switch to using setuptools for setup.py.

4.0.3
-----

* Fix bad QR code generation due to the regex comma fix in version 4.0.2.

4.0.4
-----

* Bad version number for previous hotfix release.


3.1 (12 Aug 2013)
=================

* Important fixes for incorrect matches of the alpha-numeric encoding mode.
  Previously, the pattern would match if a single line was alpha-numeric only
  (even if others wern't). Also, the two characters ``{`` and ``}`` had snuck
  in as valid characters. Thanks to Eran Tromer for the report and fix.

* Optimized chunking -- if the parts of the data stream can be encoded more
  efficiently, the data will be split into chunks of the most efficient modes.

3.1.1
-----

* Update change log to contain version 3.1 changes. :P

* Give the ``qr`` script an ``--optimize`` argument to control the chunk
  optimization setting.


3.0 (25 Jun 2013)
=================

* Python 3 support.

* Add QRCode.get_matrix, an easy way to get the matrix array of a QR code
  including the border. Thanks Hugh Rawlinson.

* Add in a workaround so that Python 2.6 users can use SVG generation (they
  must install ``lxml``).

* Some initial tests! And tox support (``pip install tox``) for testing across
  Python platforms.


2.7 (5 Mar 2013)
================

* Fix incorrect termination padding.


2.6 (2 Apr 2013)
================

* Fix the first four columns incorrectly shifted by one. Thanks to Josep
  Gómez-Suay for the report and fix.

* Fix strings within 4 bits of the QR version limit being incorrectly
  terminated. Thanks to zhjie231 for the report.


2.5 (12 Mar 2013)
=================

* The PilImage wrapper is more transparent - you can use any methods or
  attributes available to the underlying PIL Image instance.

* Fixed the first column of the QR Code coming up empty! Thanks to BecoKo.

2.5.1
-----

* Fix installation error on Windows.


2.4 (23 Apr 2012)
=================

* Use a pluggable backend system for generating images, thanks to Branko Čibej!
  Comes with PIL and SVG backends built in.

2.4.1
-----

* Fix a packaging issue

2.4.2
-----

* Added a ``show`` method to the PIL image wrapper so the ``run_example``
  function actually works.


2.3 (29 Jan 2012)
=================

* When adding data, auto-select the more efficient encoding methods for numbers
  and alphanumeric data (KANJI still not supported).

2.3.1
-----

* Encode unicode to utf-8 bytestrings when adding data to a QRCode.


2.2 (18 Jan 2012)
=================

* Fixed tty output to work on both white and black backgrounds.

* Added `border` parameter to allow customizing of the number of boxes used to
  create the border of the QR code


2.1 (17 Jan 2012)
=================

* Added a ``qr`` script which can be used to output a qr code to the tty using
  background colors, or to a file via a pipe.