Drop support for EOL Python 2 (#61)

* remove reliance on ancient compatibility libraries

* review of the PR

* drop Python2.7 from github workflow

.github/workflows/build-status.yml

@@ -15,8 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        # <=2.6 and 2.8 isn't available: https://github.com/actions/python-versions/blob/main/versions-manifest.json
-        python-version: ['2.7', '3.x']
+        python-version: ['3.x']
 
     steps:
     - uses: actions/checkout@v2

README.md

@@ -1,7 +1,7 @@
 
 # python-mpegdash
 
-MPEG-DASH MPD (Media Presentation Description) Parser compatible with Python 2.6+ and Python 3.
+MPEG-DASH MPD (Media Presentation Description) Parser compatible with Python 3+.
 
 [![Build Status](https://img.shields.io/github/workflow/status/sangwonl/python-mpegdash/Build%20Status?label=Python%202.7%2B%20builds)](https://github.com/sangwonl/python-mpegdash/actions?query=workflow%3A%22Build+Status%22)
 [![License](https://img.shields.io/github/license/sangwonl/python-mpegdash?style=flat)](https://github.com/sangwonl/python-mpegdash/blob/master/LICENSE)
@@ -20,7 +20,6 @@ $ pip install mpegdash
 
 ```bash
 $ python -m unittest discover
-$ python3 -m unittest discover
 ```
 
 * * *

mpegdash/parser.py

@@ -1,11 +1,6 @@
+from urllib.request import urlopen
 from xml.dom import minidom
 
-# python3 support
-try:
-    from urllib2 import urlopen
-except ImportError:
-    from urllib.request import urlopen
-
 from mpegdash.nodes import MPEGDASH
 from mpegdash.utils import parse_child_nodes, write_child_node
 from mpegdash.prettyprinter import pretty_print

mpegdash/utils.py

@@ -1,4 +1,3 @@
-from past.builtins import unicode   # python3 compat
 from xml.dom import minidom
 
 import re
@@ -19,7 +18,7 @@ def parse_child_nodes(xmlnode, tag_name, node_type):
 
     nodes = []
     for elem in elements:
-        if node_type in (unicode, str):
+        if isinstance(node_type, str):
             node = xmlnode.firstChild.nodeValue
         else:
             node = node_type()

requirements.txt

@@ -1 +0,0 @@
-future

setup.py

@@ -17,9 +17,7 @@
   license="MIT",
   zip_safe=False,
   include_package_data=True,
-  install_requires=["future"],
   url="https://github.com/sangwonl/python-mpegdash",
-  tests_require=["unittest2"],
   test_suite="tests.my_module_suite",
   classifiers=[
     "Programming Language :: Python",

tests/__init__.py

@@ -1,7 +1,4 @@
-try:
-    import unittest
-except ImportError:
-    import unittest2 as unittest
+import unittest
 
 
 def my_module_suite():

tests/test_mpdtoxml.py

@@ -1,7 +1,4 @@
-try:
-    import unittest
-except ImportError:
-    import unittest2 as unittest
+import unittest
 
 from sys import version_info
 from mpegdash.parser import MPEGDASHParser

tests/test_xmltompd.py

@@ -1,7 +1,4 @@
-try:
-    import unittest
-except ImportError:
-    import unittest2 as unittest
+import unittest
 
 from mpegdash.parser import MPEGDASHParser