Improved 'cleanall' option to remove Cython files.

setup.py

@@ -64,22 +64,28 @@ for root, dirs, files in os.walk(os.path.join(os.getcwd(), 'user_libs')):
 if 'cleanall' in sys.argv:
     USE_CYTHON = False
     print('Deleting Cython files...')
-    for file in cythonfiles:
+    for entry in os.scandir(os.path.join(os.getcwd(), packagename)):
-        tmp = os.path.splitext(file)
+        for file in cythonfiles:
-        cfile = tmp[0] + '.c'
+            tmp = os.path.splitext(file)
-        if sys.platform == 'win32':
+            if entry.name.startswith(tmp[0]):
-            libfile = tmp[0] + '.pyd'
+                # Remove Cython C files
-        else:
+                try:
-            libfile = tmp[0] + '.so'
+                    os.remove(tmp[0] + '.c')
-        try:
+                except OSError:
-            os.remove(cfile)
+                    print('Could not remove: {}'.format(tmp[0] + '.c'))
-        except OSError:
+                # Remove compiled Cython modules
-            print('Could not remove: {}'.format(cfile))
+                libfilename = entry.name.split('.')[0]
-        try:
+                if sys.platform == 'win32':
-            os.remove(libfile)
+                    libfile = libfilename + '.pyd'
-        except OSError:
+                else:
-            print('Could not remove: {}'.format(libfile))
+                    libfile = libfilename + '.so'
-        shutil.rmtree('build', ignore_errors=True)
+            
+                try:
+                    os.remove(libfile)
+                except OSError:
+                    print('Could not remove: {}'.format(libfile))
+    # Remove build directory
+    shutil.rmtree(os.path.join(os.getcwd(), 'build'), ignore_errors=True)
     # Now do a normal clean
     sys.argv[1] = 'clean'  # this is what distutils understands