Remove six

debtcollector is one of the few remaining OpenStack libraries still
using six. Like the other libraries that have since removed it,
debtcollector no longer actually needs this since it only supports
Python 3. Remove the library.

Signed-off-by: Stephen Finucane <stephenfin@redhat.com>
Change-Id: Ia16572985a46afe39b53a199ebabb695cd05ae2d

debtcollector/_utils.py

@@ -19,8 +19,6 @@ import inspect
 import types
 import warnings
 
-import six
-
 try:
     _TYPE_TYPE = types.TypeType
 except AttributeError:
@@ -91,14 +89,7 @@ def generate_message(prefix, postfix=None, message=None,
 
 def get_assigned(decorator):
     """Helper to fix/workaround https://bugs.python.org/issue3445"""
-    if six.PY3:
     return functools.WRAPPER_ASSIGNMENTS
-    else:
-        assigned = []
-        for attr_name in functools.WRAPPER_ASSIGNMENTS:
-            if hasattr(decorator, attr_name):
-                assigned.append(attr_name)
-        return tuple(assigned)
 
 
 def get_class_name(obj, fully_qualified=True):
@@ -108,7 +99,7 @@ def get_class_name(obj, fully_qualified=True):
     Else, fully qualified name of the type of the object is returned.
     For builtin types, just name is returned.
     """
-    if not isinstance(obj, six.class_types):
+    if not isinstance(obj, type):
         obj = type(obj)
     try:
         built_in = obj.__module__ in _BUILTIN_MODULES
@@ -129,7 +120,7 @@ def get_method_self(method):
     if not inspect.ismethod(method):
         return None
     try:
-        return six.get_method_self(method)
+        return getattr(method, '__self__')
     except AttributeError:
         return None
 
@@ -142,7 +133,7 @@ def get_callable_name(function):
     method_self = get_method_self(function)
     if method_self is not None:
         # This is a bound method.
-        if isinstance(method_self, six.class_types):
+        if isinstance(method_self, type):
             # This is a bound class method.
             im_class = method_self
         else:

debtcollector/moves.py

@@ -14,9 +14,9 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+import functools
 import inspect
 
-import six
 import wrapt
 
 from debtcollector import _utils
@@ -76,7 +76,7 @@ def moved_function(new_func, old_func_name, old_module_name,
                                           message=message, version=version,
                                           removal_version=removal_version)
 
-    @six.wraps(new_func, assigned=_utils.get_assigned(new_func))
+    @functools.wraps(new_func, assigned=_utils.get_assigned(new_func))
     def old_new_func(*args, **kwargs):
         _utils.deprecation(out_message, stacklevel=stacklevel,
                            category=category)
@@ -183,7 +183,7 @@ def moved_class(new_class, old_class_name, old_module_name,
 
     def decorator(f):
 
-        @six.wraps(f, assigned=_utils.get_assigned(f))
+        @functools.wraps(f, assigned=_utils.get_assigned(f))
         def wrapper(self, *args, **kwargs):
             _utils.deprecation(out_message, stacklevel=stacklevel,
                                category=category)

debtcollector/removals.py

@@ -15,7 +15,6 @@
 import functools
 import inspect
 
-import six
 import wrapt
 
 from debtcollector import _utils
@@ -270,7 +269,7 @@ def removed_class(cls_name, replacement=None, message=None,
 
     def _wrap_it(old_init, out_message):
 
-        @six.wraps(old_init, assigned=_utils.get_assigned(old_init))
+        @functools.wraps(old_init, assigned=_utils.get_assigned(old_init))
         def new_init(self, *args, **kwargs):
             _utils.deprecation(out_message, stacklevel=stacklevel,
                                category=category)
@@ -315,7 +314,7 @@ def removed_module(module, replacement=None, message=None,
     """
     if inspect.ismodule(module):
         module_name = _get_qualified_name(module)
-    elif isinstance(module, six.string_types):
+    elif isinstance(module, str):
         module_name = module
     else:
         _qual, type_name = _utils.get_qualified_name(type(module))

requirements.txt

@@ -4,5 +4,4 @@
 
 pbr!=2.1.0,>=2.0.0 # Apache-2.0
 importlib_metadata>=1.7.0;python_version<'3.8' # Apache-2.0
-six>=1.10.0 # MIT
 wrapt>=1.7.0 # BSD License