Set minimum python version to 3.6 and test on python 3.8 (#837)

.travis.yml

@@ -1,6 +1,7 @@
 language: python
 
 python:
+  - "3.8"
   - "3.7"
   - "3.6"
   - "pypy3"
@@ -21,7 +22,7 @@ before_script:
 
 script:
   - pytest --cov-report term-missing --cov=pynamodb tests
-  - if [[ "$TRAVIS_PYTHON_VERSION" == "3.7" ]]; then mypy .; fi
+  - if [[ "$TRAVIS_PYTHON_VERSION" == "3.8" ]]; then mypy .; fi
   - sphinx-build -W docs /tmp/docs-build
 
 after_success:
@@ -36,4 +37,4 @@ deploy:
   distributions: "sdist bdist_wheel"
   on:
     tags: true
-    condition: $TRAVIS_PYTHON_VERSION = 3.7
+    condition: $TRAVIS_PYTHON_VERSION = 3.8

README.rst

@@ -227,7 +227,7 @@ Want to backup and restore a table? No problem.
 Features
 ========
 
-* Python >= 3.5 support
+* Python >= 3.6 support
 * An ORM-like interface with query and scan filters
 * Compatible with DynamoDB Local
 * Supports the entire DynamoDB API

docs/tutorial.rst

@@ -2,8 +2,7 @@ Basic Tutorial
 ==============
 
 PynamoDB is attempt to be a Pythonic interface to DynamoDB that supports all of DynamoDB's
-powerful features in *both* Python 3, and Python 2. This includes support for unicode and
-binary attributes.
+powerful features. This includes support for unicode and binary attributes.
 
 But why stop there? PynamoDB also supports:
 
@@ -216,7 +215,7 @@ PynamoDB comes with several built in attribute types for convenience, which incl
 * :py:class:`JSONAttribute <pynamodb.attributes.JSONAttribute>`
 * :py:class:`MapAttribute <pynamodb.attributes.MapAttribute>`
 
-All of these built in attributes handle serializing and deserializng themselves, in both Python 2 and Python 3.
+All of these built in attributes handle serializing and deserializng themselves.
 
 Creating the table
 ------------------

examples/url_shortener/README.rst

@@ -3,7 +3,6 @@ A very short URL shortener
 ==========================
 
 This is a very small implementation of a `URL shortener <http://en.wikipedia.org/wiki/URL_shortening>`_ powered by Flask and PynamoDB.
-This example works with both Python 2 and Python 3.
 
 Try it for yourself in three easy steps, assuming you have `access to AWS <https://pynamodb.readthedocs.io/en/latest/awsaccess.html>`_.
 

pynamodb/attributes.py

@@ -312,11 +312,11 @@ def _set_attributes(self, **attributes: Attribute) -> None:
             setattr(self, attr_name, attr_value)
 
     def __eq__(self, other: Any) -> bool:
-        # This is required for python 2 support so that MapAttribute can call this method.
+        # This is required so that MapAttribute can call this method.
         return self is other
 
     def __ne__(self, other: Any) -> bool:
-        # This is required for python 2 support so that MapAttribute can call this method.
+        # This is required so that MapAttribute can call this method.
         return self is not other
 
 

setup.py

@@ -27,6 +27,7 @@
         'Operating System :: OS Independent',
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
+        'Programming Language :: Python :: 3.8',
         'License :: OSI Approved :: MIT License',
     ],
     extras_require={