bpo-29877: compileall: import ProcessPoolExecutor only when needed (GH-4856)

Importing ProcessPoolExecutor may hang or cause an error when the import
accesses urandom on a low resource platform


https://bugs.python.org/issue29877

1 files changed, 4 insertions, 4 deletions

diff --git a/Lib/test/test_compileall.py b/Lib/test/test_compileall.py
index bf2a2c4..2e25523 100644
--- a/Lib/test/test_compileall.py
+++ b/Lib/test/test_compileall.py
@@ -167,7 +167,7 @@ class CompileallTestsBase:
         self.assertRegex(line, r'Listing ([^WindowsPath|PosixPath].*)')
         self.assertTrue(os.path.isfile(self.bc_path))
 
-    @mock.patch('compileall.ProcessPoolExecutor')
+    @mock.patch('concurrent.futures.ProcessPoolExecutor')
     def test_compile_pool_called(self, pool_mock):
         compileall.compile_dir(self.directory, quiet=True, workers=5)
         self.assertTrue(pool_mock.called)
@@ -177,19 +177,19 @@ class CompileallTestsBase:
                                     "workers must be greater or equal to 0"):
             compileall.compile_dir(self.directory, workers=-1)
 
-    @mock.patch('compileall.ProcessPoolExecutor')
+    @mock.patch('concurrent.futures.ProcessPoolExecutor')
     def test_compile_workers_cpu_count(self, pool_mock):
         compileall.compile_dir(self.directory, quiet=True, workers=0)
         self.assertEqual(pool_mock.call_args[1]['max_workers'], None)
 
-    @mock.patch('compileall.ProcessPoolExecutor')
+    @mock.patch('concurrent.futures.ProcessPoolExecutor')
     @mock.patch('compileall.compile_file')
     def test_compile_one_worker(self, compile_file_mock, pool_mock):
         compileall.compile_dir(self.directory, quiet=True)
         self.assertFalse(pool_mock.called)
         self.assertTrue(compile_file_mock.called)
 
-    @mock.patch('compileall.ProcessPoolExecutor', new=None)
+    @mock.patch('concurrent.futures.ProcessPoolExecutor', new=None)
     @mock.patch('compileall.compile_file')
     def test_compile_missing_multiprocessing(self, compile_file_mock):
         compileall.compile_dir(self.directory, quiet=True, workers=5)