Revert "Remove support for Python 2"

This reverts commit ca02d12fc6.

.github/workflows/main.yml

@@ -7,7 +7,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [3.6, 3.7, 3.8, 3.9, "3.10", 3.11]
+        python-version: [2.7, 3.6, 3.7, 3.8, 3.9, "3.10", 3.11]
         os: [ubuntu-20.04, windows-2019]
 
     runs-on: ${{ matrix.os }}

CHANGES.rst

@@ -1,9 +1,6 @@
-2.0.0.dev0 (Next Release)
+1.2.0.dev0 (Next Release)
 -------------------------
 
-- Support for some older Python versions has been dropped.  Py65
-  now requires Python 3.6 or later.
-
 - Fixed a bug with character input that would cause characters to be
   dropped when pasting in larger amounts of text.  This makes it possible
   to paste programs into EhBASIC and Taliforth.  Patch by SamCoVT.

README.rst

@@ -20,9 +20,9 @@ Installation
 
 Py65 packages are `available <http://pypi.python.org/pypi/py65>`_ on the
 Python Package Index (PyPI).  You download them from there or you can
-use ``pip3`` to automatically install or upgrade Py65::
+use ``pip`` to automatically install or upgrade Py65::
 
-    $ pip3 install -U py65
+    $ pip install -U py65
 
 Devices
 -------

py65/monitor.py

@@ -22,8 +22,6 @@ import shlex
 import sys
 import traceback
 
-from urllib.request import urlopen
-
 from py65.devices.mpu6502 import MPU as NMOS6502
 from py65.devices.mpu65c02 import MPU as CMOS65C02
 from py65.devices.mpu65org16 import MPU as V65Org16
@@ -34,6 +32,11 @@ from py65.utils import console
 from py65.utils.conversions import itoa
 from py65.memory import ObservableMemory
 
+try:
+    from urllib2 import urlopen
+except ImportError: # Python 3
+    from urllib.request import urlopen
+
 class Monitor(cmd.Cmd):
 
     Microprocessors = {'6502': NMOS6502, '65C02': CMOS65C02,

py65/tests/test_monitor.py

@@ -2,11 +2,13 @@ import unittest
 import sys
 import os
 import tempfile
-
-from io import StringIO
-
 from py65.monitor import Monitor
 
+try:
+    from StringIO import StringIO
+except ImportError: # Python 3
+    from io import StringIO
+
 
 class MonitorTests(unittest.TestCase):
 

setup.py

@@ -3,9 +3,14 @@ __version__ = '2.0.0.dev0'
 import sys
 
 py_version = sys.version_info[:2]
+PY3 = py_version[0] == 3
 
-if py_version < (3, 6):
-    raise RuntimeError('On Python 3, Py65 requires Python 3.6 or later')
+if PY3:
+    if py_version < (3, 4):
+        raise RuntimeError('On Python 3, Py65 requires Python 3.6 or later')
+else:
+    if py_version < (2, 7):
+        raise RuntimeError('On Python 2, Py65 requires Python 2.7 or later')
 
 from setuptools import setup, find_packages
 
@@ -19,6 +24,8 @@ CLASSIFIERS = [
     'Natural Language :: English',
     'Operating System :: POSIX',
     'Programming Language :: Python',
+    'Programming Language :: Python :: 2',
+    'Programming Language :: Python :: 2.7',
     'Programming Language :: Python :: 3',
     'Programming Language :: Python :: 3.6',
     'Programming Language :: Python :: 3.7',