ansible_mitogen: Consolidate Python 2 & 3 compatibility

Rough guidelines, in decending preference:
- Use mitogen.core if possible
- Use ansible.module_utils.six if possible
- Embed a getattr() or try/except

viewkeys() et al can't be brought into mitogen.core because that package still
targets Python 2.4. dict.viewkeys() were introduced in Python 2.7.

ansible_mitogen/mixins.py

@@ -35,11 +35,6 @@ import pwd
 import random
 import traceback
 
-try:
-    from shlex import quote as shlex_quote
-except ImportError:
-    from pipes import quote as shlex_quote
-
 import ansible
 import ansible.constants
 import ansible.plugins
@@ -48,6 +43,7 @@ import ansible.utils.unsafe_proxy
 import ansible.vars.clean
 
 from ansible.module_utils.common.text.converters import to_bytes, to_text
+from ansible.module_utils.six.moves import shlex_quote
 from ansible.parsing.utils.jsonify import jsonify
 
 import mitogen.core

ansible_mitogen/plugins/connection/mitogen_local.py

@@ -42,13 +42,7 @@ except ImportError:
 import ansible_mitogen.connection
 import ansible_mitogen.process
 
-
-if sys.version_info > (3,):
-    viewkeys = dict.keys
-elif sys.version_info > (2, 7):
-    viewkeys = dict.viewkeys
-else:
-    viewkeys = lambda dct: set(dct)
+viewkeys = getattr(dict, 'viewkeys', dict.keys)
 
 
 def dict_diff(old, new):

ansible_mitogen/runner.py

@@ -52,6 +52,8 @@ import tempfile
 import traceback
 import types
 
+from ansible.module_utils.six.moves import shlex_quote
+
 import mitogen.core
 import ansible_mitogen.target  # TODO: circular import
 from mitogen.core import to_text
@@ -70,12 +72,6 @@ try:
 except ImportError:
     from io import StringIO
 
-try:
-    from shlex import quote as shlex_quote
-except ImportError:
-    from pipes import quote as shlex_quote
-
-
 # Prevent accidental import of an Ansible module from hanging on stdin read.
 import ansible.module_utils.basic
 ansible.module_utils.basic._ANSIBLE_ARGS = '{}'
@@ -92,7 +88,6 @@ for symbol in 'res_init', '__res_init':
     except AttributeError:
         pass
 
-iteritems = getattr(dict, 'iteritems', dict.items)
 LOG = logging.getLogger(__name__)
 
 
@@ -600,7 +595,7 @@ class TemporaryEnvironment(object):
     def __init__(self, env=None):
         self.original = dict(os.environ)
         self.env = env or {}
-        for key, value in iteritems(self.env):
+        for key, value in mitogen.core.iteritems(self.env):
             key = mitogen.core.to_text(key)
             value = mitogen.core.to_text(value)
             if value is None:

ansible_mitogen/services.py

@@ -50,6 +50,8 @@ import threading
 
 import ansible.constants
 
+from ansible.module_utils.six import reraise
+
 import mitogen.core
 import mitogen.service
 import ansible_mitogen.loaders
@@ -66,20 +68,6 @@ LOG = logging.getLogger(__name__)
 ansible_mitogen.loaders.shell_loader.get('sh')
 
 
-if sys.version_info[0] == 3:
-    def reraise(tp, value, tb):
-        if value is None:
-            value = tp()
-        if value.__traceback__ is not tb:
-            raise value.with_traceback(tb)
-        raise value
-else:
-    exec(
-        "def reraise(tp, value, tb=None):\n"
-        "    raise tp, value, tb\n"
-     )
-
-
 def _get_candidate_temp_dirs():
     try:
         # >=2.5

ansible_mitogen/target.py

@@ -55,12 +55,6 @@ import types
 import mitogen.core
 import mitogen.parent
 import mitogen.service
-try:
-    reduce
-except NameError:
-    # Python 3.x.
-    from functools import reduce
-
 
 # Ansible since PR #41749 inserts "import __main__" into
 # ansible.module_utils.basic. Mitogen's importer will refuse such an import, so
@@ -70,6 +64,9 @@ if not sys.modules.get(str('__main__')):
     sys.modules[str('__main__')] = types.ModuleType(str('__main__'))
 
 import ansible.module_utils.json_utils
+
+from ansible.module_utils.six.moves import reduce
+
 import ansible_mitogen.runner
 
 

docs/changelog.rst

@@ -27,6 +27,8 @@ Unreleased
   fallbacks for Python 2.4 & 2.5.
 * :gh:issue:`1127` :mod:`ansible_mitogen`: Remove fallback imports for Ansible
   releases before 2.10
+* :gh:issue:`1127` :mod:`ansible_mitogen`: Consolidate Python 2 & 3
+  compatibility
 
 
 v0.3.10 (2024-09-20)