Extract 'find_spec' function to consolidate behavior. Ref #1905.

setuptools/_imp.py

@@ -17,12 +17,18 @@ C_BUILTIN = 6
 PY_FROZEN = 7
 
 
+def find_spec(module, paths):
+    finder = (
+        importlib.machinery.PathFinder().find_spec
+        if isinstance(paths, list) else
+        importlib.util.find_spec
+    )
+    return finder(module, paths)
+
+
 def find_module(module, paths=None):
     """Just like 'imp.find_module()', but with package support"""
-    if isinstance(paths, list):
-        spec = importlib.machinery.PathFinder().find_spec(module, paths)
-    else:
-        spec = importlib.util.find_spec(module, paths)
+    spec = find_spec(module, paths)
     if spec is None:
         raise ImportError("Can't find %s" % module)
     if not spec.has_location and hasattr(spec, 'submodule_search_locations'):
@@ -63,20 +69,14 @@ def find_module(module, paths=None):
 
 
 def get_frozen_object(module, paths=None):
-    if isinstance(paths, list):
-        spec = importlib.machinery.PathFinder().find_spec(module, paths)
-    else:
-        spec = importlib.util.find_spec(module, paths)
+    spec = find_spec(module, paths)
     if not spec:
         raise ImportError("Can't find %s" % module)
     return spec.loader.get_code(module)
 
 
 def get_module(module, paths, info):
-    if isinstance(paths, list):
-        spec = importlib.machinery.PathFinder().find_spec(module, paths)
-    else:
-        spec = importlib.util.find_spec(module, paths)
+    spec = find_spec(module, paths)
     if not spec:
         raise ImportError("Can't find %s" % module)
     return module_from_spec(spec)