Drop Python < 3.8

.pylintrc

@@ -347,7 +347,7 @@ init-import=no
 
 # List of qualified module names which can have objects that can redefine
 # builtins.
-redefining-builtins-modules=six.moves,future.builtins,builtins
+redefining-builtins-modules=future.builtins,builtins
 
 
 [CLASSES]

README.md

@@ -12,7 +12,7 @@
 <!-- [![Pylint](https://img.shields.io/badge/pylint-9.71%2F10-green.svg)](https://github.com/pytransitions/transitions) -->
 <!--[![Name](Image)](Link)-->
 
-A lightweight, object-oriented state machine implementation in Python with many extensions. Compatible with Python 2.7+ and 3.0+.
+A lightweight, object-oriented state machine implementation in Python with many extensions. Compatible with Python 3.8+.
 
 ## Installation
 
@@ -453,7 +453,7 @@ So far we have seen how we can give state names and use these names to work with
 If you favour stricter typing and more IDE code completion (or you just can't type 'sesquipedalophobia' any longer because the word scares you) using [Enumerations](https://docs.python.org/3/library/enum.html) might be what you are looking for:
 
 ```python
-import enum  # Python 2.7 users need to have 'enum34' installed
+import enum
 from transitions import Machine
 
 class States(enum.Enum):
@@ -1210,10 +1210,10 @@ machine = Machine(states=states, transitions=transitions, initial='solid')
 
 ### <a name="restoring"></a>(Re-)Storing machine instances
 
-Machines are picklable and can be stored and loaded with `pickle`. For Python 3.3 and earlier `dill` is required.
+Machines are picklable and can be stored and loaded with `pickle`.
 
 ```python
-import dill as pickle # only required for Python 3.3 and earlier
+import pickle
 
 m = Machine(states=['A', 'B', 'C'], initial='A')
 m.to_B()

binder/requirements.txt

@@ -1,2 +1 @@
-six
 graphviz

examples/Frequently asked questions.ipynb

@@ -445,7 +445,6 @@
    "outputs": [],
    "source": [
     "from transitions import Machine, Transition\n",
-    "from six import string_types\n",
     "\n",
     "class DependingTransition(Transition):\n",
     "\n",
@@ -464,7 +463,7 @@
     "            self.execute = super(DependingTransition, self).execute\n",
     "\n",
     "    def execute(self, event_data):\n",
-    "        func = getattr(event_data.model, self._func) if isinstance(self._func, string_types) \\\n",
+    "        func = getattr(event_data.model, self._func) if isinstance(self._func, str) \\\n",
     "               else self._func\n",
     "        self._result = func(*event_data.args, **event_data.kwargs)\n",
     "        super(DependingTransition, self).execute(event_data)\n",

noxfile.py

@@ -1,7 +1,7 @@
 import nox
 
 
-python = ["3.10", "3.11", "3.12", "3.13"]
+python = ["3.8", "3.9", "3.10", "3.11", "3.12"]
 nox.options.stop_on_first_error = True
 
 

requirements.txt

@@ -1 +0,0 @@
-six

requirements_mypy.txt

@@ -1,3 +1,2 @@
 mypy
 graphviz
-types-six

requirements_test.txt

@@ -3,5 +3,4 @@ pytest-cov
 pytest-runner
 pytest-xdist
 mock
-dill
 pycodestyle

setup.py

@@ -43,16 +43,13 @@
         "transitions.tests": ["data/*"],
     },
     include_package_data=True,
-    install_requires=["six"],
     extras_require=extras_require,
     tests_require=tests_require,
     license="MIT",
     download_url="https://github.com/pytransitions/transitions/archive/%s.tar.gz"
     % __version__,
     classifiers=[
         "License :: OSI Approved :: MIT License",
-        "Programming Language :: Python :: 2",
-        "Programming Language :: Python :: 2.7",
         "Programming Language :: Python :: 3",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",

tests/test_core.py

@@ -19,7 +19,7 @@
 try:
     from unittest.mock import MagicMock
 except ImportError:
-    from mock import MagicMock  # type: ignore
+    from mock import MagicMock
 
 if TYPE_CHECKING:
     from typing import Sequence
@@ -559,10 +559,7 @@ def on_enter_B(self, event):
 
     def test_pickle(self):
         import sys
-        if sys.version_info < (3, 4):
-            import dill as pickle
-        else:
-            import pickle
+        import pickle
 
         states = ['A', 'B', 'C', 'D']
         # Define with list of dictionaries
@@ -581,10 +578,7 @@ def test_pickle(self):
 
     def test_pickle_model(self):
         import sys
-        if sys.version_info < (3, 4):
-            import dill as pickle
-        else:
-            import pickle
+        import pickle
 
         self.stuff.to_B()
         dump = pickle.dumps(self.stuff)

tests/test_markup.py

@@ -15,17 +15,10 @@
 try:
     from unittest.mock import MagicMock
 except ImportError:
-    from mock import MagicMock  # type: ignore
+    from mock import MagicMock
 
-try:
-    import enum
-    from enum import Enum
-except ImportError:
-    enum = None  # type: ignore
-
-    # placeholder for Python < 3.4 without enum
-    class Enum:  # type: ignore
-        pass
+import enum
+from enum import Enum
 
 if TYPE_CHECKING:
     from typing import List, Dict, Sequence, Union, Type

tests/test_nesting.py

@@ -1,8 +1,4 @@
 # -*- coding: utf-8 -*-
-try:
-    from builtins import object
-except ImportError:
-    pass
 
 import sys
 import tempfile
@@ -20,7 +16,7 @@
 try:
     from unittest.mock import MagicMock
 except ImportError:
-    from mock import MagicMock  # type: ignore
+    from mock import MagicMock
 
 try:
     # Just to skip tests if graphviz not installed
@@ -36,7 +32,7 @@
 default_separator = NestedState.separator
 
 
-class Dummy(object):
+class Dummy:
     pass
 
 
@@ -296,10 +292,7 @@ def test_ordered_transitions(self):
 
     def test_pickle(self):
         print("separator", self.state_cls.separator)
-        if sys.version_info < (3, 4):
-            import dill as pickle
-        else:
-            import pickle
+        import pickle
 
         states = ['A', 'B', {'name': 'C', 'children': ['1', '2', {'name': '3', 'children': ['a', 'b', 'c']}]},
                   'D', 'E', 'F']

tests/test_parallel.py

@@ -16,7 +16,7 @@
 try:
     from unittest.mock import MagicMock
 except ImportError:
-    from mock import MagicMock  # type: ignore
+    from mock import MagicMock
 
 
 class TestParallel(TestNested):

tests/test_reuse.py

@@ -15,7 +15,7 @@
 try:
     from unittest.mock import MagicMock
 except ImportError:
-    from mock import MagicMock  # type: ignore
+    from mock import MagicMock
 
 
 if TYPE_CHECKING:

tests/test_states.py

@@ -10,7 +10,7 @@
 try:
     from unittest.mock import MagicMock
 except ImportError:
-    from mock import MagicMock  # type: ignore
+    from mock import MagicMock
 
 
 if TYPE_CHECKING:

tests/test_threading.py

@@ -15,7 +15,7 @@
 try:
     from unittest.mock import MagicMock
 except ImportError:
-    from mock import MagicMock  # type: ignore
+    from mock import MagicMock
 
 if TYPE_CHECKING:
     from typing import List, Type, Tuple, Any
@@ -85,10 +85,7 @@ def test_conditional_access(self):
 
     def test_pickle(self):
         import sys
-        if sys.version_info < (3, 4):
-            import dill as pickle
-        else:
-            import pickle
+        import pickle
 
         # go to non initial state B
         self.stuff.to_B()
@@ -253,10 +250,7 @@ def on_enter_A(self):
 
     def test_pickle(self):
         import sys
-        if sys.version_info < (3, 4):
-            import dill as pickle
-        else:
-            import pickle
+        import pickle
 
         states = ['A', 'B', {'name': 'C', 'children': ['1', '2', {'name': '3', 'children': ['a', 'b', 'c']}]},
                   'D', 'E', 'F']

transitions/__init__.py

@@ -2,7 +2,7 @@
 transitions
 -----------
 
-A lightweight, object-oriented state machine implementation in Python. Compatible with Python 2.7+ and 3.0+.
+A lightweight, object-oriented state machine implementation in Python. Compatible with Python 3.8+.
 """
 
 from __future__ import absolute_import