Drop Python 2 support

10 files changed, 32 insertions, 78 deletions

diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index f66d308..94af983 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -12,7 +12,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["2.7", "3.5", "3.6", "3.7", "3.8", "3.9"]
+        python-version: ["3.6", "3.7", "3.8", "3.9"]
     steps:
       - uses: "actions/checkout@v2"
       - uses: "actions/setup-python@v2"
diff --git a/CHANGES.txt b/CHANGES.txt
index a86065b..c6e5151 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -22,6 +22,7 @@ defusedxml 0.7.0rc2
 - Use GitHub Actions instead of TravisCI
 - Restore ``ElementTree`` attribute of ``xml.etree`` module after patching
 
+
 defusedxml 0.7.0rc1
 -------------------
 
diff --git a/defusedxml/ElementTree.py b/defusedxml/ElementTree.py
index 55c123e..441f0a4 100644
--- a/defusedxml/ElementTree.py
+++ b/defusedxml/ElementTree.py
@@ -1,6 +1,6 @@
 # defusedxml
 #
-# Copyright (c) 2013 by Christian Heimes <christian@python.org>
+# Copyright (c) 2013-2020 by Christian Heimes <christian@python.org>
 # Licensed to PSF under a Contributor Agreement.
 # See https://www.python.org/psf/license for licensing details.
 """Defused xml.etree.ElementTree facade
@@ -13,14 +13,7 @@ from xml.etree.ElementTree import TreeBuilder as _TreeBuilder
 from xml.etree.ElementTree import parse as _parse
 from xml.etree.ElementTree import tostring
 
-from .common import PY3
-
-if PY3:
-    import importlib
-else:
-    from xml.etree.ElementTree import XMLParser as _XMLParser
-    from xml.etree.ElementTree import iterparse as _iterparse
-    from xml.etree.ElementTree import ParseError
+import importlib
 
 
 from .common import (
@@ -68,8 +61,7 @@ def _get_py3_cls():
     return _XMLParser, _iterparse, ParseError
 
 
-if PY3:
-    _XMLParser, _iterparse, ParseError = _get_py3_cls()
+_XMLParser, _iterparse, ParseError = _get_py3_cls()
 
 _sentinel = object()
 
@@ -84,8 +76,7 @@ class DefusedXMLParser(_XMLParser):
         forbid_entities=True,
         forbid_external=True,
     ):
-        # Python 2.x old style class
-        _XMLParser.__init__(self, target=target, encoding=encoding)
+        super().__init__(target=target, encoding=encoding)
         if html is not _sentinel:
             # the 'html' argument has been deprecated and ignored in all
             # supported versions of Python. Python 3.8 finally removed it.
@@ -101,10 +92,7 @@ class DefusedXMLParser(_XMLParser):
         self.forbid_dtd = forbid_dtd
         self.forbid_entities = forbid_entities
         self.forbid_external = forbid_external
-        if PY3:
-            parser = self.parser
-        else:
-            parser = self._parser
+        parser = self.parser
         if self.forbid_dtd:
             parser.StartDoctypeDeclHandler = self.defused_start_doctype_decl
         if self.forbid_entities:
diff --git a/defusedxml/common.py b/defusedxml/common.py
index 5ceda1f..d286009 100644
--- a/defusedxml/common.py
+++ b/defusedxml/common.py
@@ -1,6 +1,6 @@
 # defusedxml
 #
-# Copyright (c) 2013 by Christian Heimes <christian@python.org>
+# Copyright (c) 2013-2020 by Christian Heimes <christian@python.org>
 # Licensed to PSF under a Contributor Agreement.
 # See https://www.python.org/psf/license for licensing details.
 """Common constants, exceptions and helpe functions
@@ -8,7 +8,7 @@
 import sys
 import xml.parsers.expat
 
-PY3 = sys.version_info[0] == 3
+PY3 = True
 
 # Fail early when pyexpat is not installed correctly
 if not hasattr(xml.parsers.expat, "ParserCreate"):
@@ -26,7 +26,7 @@ class DTDForbidden(DefusedXmlException):
     """Document type definition is forbidden"""
 
     def __init__(self, name, sysid, pubid):
-        super(DTDForbidden, self).__init__()
+        super().__init__()
         self.name = name
         self.sysid = sysid
         self.pubid = pubid
@@ -40,7 +40,7 @@ class EntitiesForbidden(DefusedXmlException):
     """Entity definition is forbidden"""
 
     def __init__(self, name, value, base, sysid, pubid, notation_name):
-        super(EntitiesForbidden, self).__init__()
+        super().__init__()
         self.name = name
         self.value = value
         self.base = base
@@ -57,7 +57,7 @@ class ExternalReferenceForbidden(DefusedXmlException):
     """Resolving an external reference is forbidden"""
 
     def __init__(self, context, base, sysid, pubid):
-        super(ExternalReferenceForbidden, self).__init__()
+        super().__init__()
         self.context = context
         self.base = base
         self.sysid = sysid
diff --git a/defusedxml/expatreader.py b/defusedxml/expatreader.py
index 890e1d1..9d36dc3 100644
--- a/defusedxml/expatreader.py
+++ b/defusedxml/expatreader.py
@@ -25,7 +25,7 @@ class DefusedExpatParser(_ExpatParser):
         forbid_entities=True,
         forbid_external=True,
     ):
-        _ExpatParser.__init__(self, namespaceHandling, bufsize)
+        super().__init__(namespaceHandling, bufsize)
         self.forbid_dtd = forbid_dtd
         self.forbid_entities = forbid_entities
         self.forbid_external = forbid_external
@@ -46,7 +46,7 @@ class DefusedExpatParser(_ExpatParser):
         raise ExternalReferenceForbidden(context, base, sysid, pubid)
 
     def reset(self):
-        _ExpatParser.reset(self)
+        super().reset()
         parser = self._parser
         if self.forbid_dtd:
             parser.StartDoctypeDeclHandler = self.defused_start_doctype_decl
diff --git a/defusedxml/xmlrpc.py b/defusedxml/xmlrpc.py
index fbc674d..39e9245 100644
--- a/defusedxml/xmlrpc.py
+++ b/defusedxml/xmlrpc.py
@@ -11,23 +11,14 @@ from __future__ import print_function, absolute_import
 
 import io
 
-from .common import DTDForbidden, EntitiesForbidden, ExternalReferenceForbidden, PY3
-
-if PY3:
-    __origin__ = "xmlrpc.client"
-    from xmlrpc.client import ExpatParser
-    from xmlrpc import client as xmlrpc_client
-    from xmlrpc import server as xmlrpc_server
-    from xmlrpc.client import gzip_decode as _orig_gzip_decode
-    from xmlrpc.client import GzipDecodedResponse as _OrigGzipDecodedResponse
-else:
-    __origin__ = "xmlrpclib"
-    from xmlrpclib import ExpatParser
-    import xmlrpclib as xmlrpc_client
-
-    xmlrpc_server = None
-    from xmlrpclib import gzip_decode as _orig_gzip_decode
-    from xmlrpclib import GzipDecodedResponse as _OrigGzipDecodedResponse
+from .common import DTDForbidden, EntitiesForbidden, ExternalReferenceForbidden
+
+__origin__ = "xmlrpc.client"
+from xmlrpc.client import ExpatParser
+from xmlrpc import client as xmlrpc_client
+from xmlrpc import server as xmlrpc_server
+from xmlrpc.client import gzip_decode as _orig_gzip_decode
+from xmlrpc.client import GzipDecodedResponse as _OrigGzipDecodedResponse
 
 try:
     import gzip
@@ -87,7 +78,7 @@ class DefusedGzipDecodedResponse(gzip.GzipFile if gzip else object):
         if limit >= 0 and len(data) > limit:
             raise ValueError("max payload length exceeded")
         self.stringio = io.BytesIO(data)
-        gzip.GzipFile.__init__(self, mode="rb", fileobj=self.stringio)
+        super().__init__(mode="rb", fileobj=self.stringio)
 
     def read(self, n):
         if self.limit >= 0:
@@ -99,16 +90,16 @@ class DefusedGzipDecodedResponse(gzip.GzipFile if gzip else object):
                 raise ValueError("max payload length exceeded")
             return data
         else:
-            return gzip.GzipFile.read(self, n)
+            return super().read(n)
 
     def close(self):
-        gzip.GzipFile.close(self)
+        super().close()
         self.stringio.close()
 
 
 class DefusedExpatParser(ExpatParser):
     def __init__(self, target, forbid_dtd=False, forbid_entities=True, forbid_external=True):
-        ExpatParser.__init__(self, target)
+        super().__init__(target)
         self.forbid_dtd = forbid_dtd
         self.forbid_entities = forbid_entities
         self.forbid_external = forbid_external
diff --git a/pyproject.toml b/pyproject.toml
index ef0550c..04a757d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,4 +1,3 @@
 [tool.black]
 line-length = 98
-# black does not yet support py39
-target-version = ['py27', 'py35', 'py36', 'py37', 'py38']
+target-version = ['py36', 'py37', 'py38']
diff --git a/setup.py b/setup.py
index 9be51bd..fa459f5 100644
--- a/setup.py
+++ b/setup.py
@@ -1,5 +1,4 @@
 #!/usr/bin/env python
-from __future__ import absolute_import
 import sys
 from distutils.core import Command
 import subprocess
@@ -52,15 +51,12 @@ setup(
         "License :: OSI Approved :: Python Software Foundation License",
         "Natural Language :: English",
         "Programming Language :: Python",
-        "Programming Language :: Python :: 2",
-        "Programming Language :: Python :: 2.7",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.5",
         "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Topic :: Text Processing :: Markup :: XML",
     ],
-    python_requires=">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*",
+    python_requires=">=3.6",
 )
diff --git a/tests.py b/tests.py
index 89fb985..f9dbfff 100644
--- a/tests.py
+++ b/tests.py
@@ -19,8 +19,6 @@ from defusedxml import (
     ExternalReferenceForbidden,
     NotSupportedError,
 )
-from defusedxml.common import PY3
-
 
 if sys.version_info < (3, 7):
     warnings.filterwarnings("once", category=DeprecationWarning)
@@ -62,11 +60,7 @@ os.environ["ftp_proxy"] = os.environ["http_proxy"]
 
 
 class DefusedTestCase(unittest.TestCase):
-
-    if PY3:
-        content_binary = False
-    else:
-        content_binary = True
+    content_binary = False
 
     xml_dtd = os.path.join(HERE, "xmltestdata", "dtd.xml")
     xml_external = os.path.join(HERE, "xmltestdata", "external.xml")
@@ -280,19 +274,13 @@ class TestDefusedSax(BaseTests):
     dtd_external_ref = True
 
     def parse(self, xmlfile, **kwargs):
-        if PY3:
-            result = io.StringIO()
-        else:
-            result = io.BytesIO()
+        result = io.StringIO()
         handler = XMLGenerator(result)
         self.module.parse(xmlfile, handler, **kwargs)
         return result.getvalue()
 
     def parseString(self, xmlstring, **kwargs):
-        if PY3:
-            result = io.StringIO()
-        else:
-            result = io.BytesIO()
+        result = io.StringIO()
         handler = XMLGenerator(result)
         self.module.parseString(xmlstring, handler, **kwargs)
         return result.getvalue()
diff --git a/tox.ini b/tox.ini
index d9d64fe..e283efb 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py27,py35,py36,py37,py38,py39,py310,black,pep8py2,pep8py3,doc
+envlist = py36,py37,py38,py39,py310,black,pep8py3,doc
 skip_missing_interpreters = true
 
 [testenv]
@@ -23,13 +23,6 @@ commands = black --check --verbose \
     {toxinidir}/defusedxml/
 deps = black
 
-[testenv:pep8py2]
-basepython = python2.7
-deps =
-    flake8
-commands =
-    {envpython} -m flake8
-
 [testenv:pep8py3]
 basepython = python3
 deps =
@@ -56,8 +49,6 @@ max-line-length = 98
 
 [gh-actions]
 python =
-    2.7: py27, pep8py2
-    3.5: py35
     3.6: py36
     3.7: py37
     3.8: py38, pep8py3, doc