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drop Python 2.7 support

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Python 2.7 EOL is arriving on 2020-01-01: https://pythonclock.org/

This will allow us to use Python 3 only libraries, like python-barcode,
which can maintain a reduced, simpler codebase, due to only one version
to support.

Closes #371.

Signed-off-by: Romain Porte <microjoe@microjoe.org>
This commit is contained in:
Romain Porte
2019-10-07 07:43:23 +02:00
parent 142fc4af71
commit cb30d7a881
35 changed files with 3 additions and 147 deletions
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19
CONTRIBUTING.rst
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@@ -27,25 +27,6 @@ Style-Guide
When writing code please try to stick to these rules.
Python 2 and 3
^^^^^^^^^^^^^^
We have rewritten the code in order to maintain compatibility with both Python 2 and Python 3.
In order to ensure that we do not miss any accidental degradation, please add these imports to the top
of every file of code:
.. code-block:: Python
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
from __future__ import unicode_literals
Furthermore please be aware of the differences between Python 2 and 3. For
example `this guide <https://docs.python.org/3/howto/pyporting.html>`_ is helpful.
Special care has to be taken when dealing with strings and byte-strings. Please note
that the :py:meth:`~escpos.escpos.Escpos._raw`-method only accepts byte-strings.
Often you can achieve compatibility quite easily with a tool from the `six`-package.
PEP8
^^^^
The entire codebase adheres to the rules of PEP8.