diff options
Diffstat (limited to 'Lib/compileall.py')
| -rw-r--r-- | Lib/compileall.py | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/Lib/compileall.py b/Lib/compileall.py index 7259212..40b148d 100644 --- a/Lib/compileall.py +++ b/Lib/compileall.py @@ -16,10 +16,6 @@ import importlib.util import py_compile import struct -try: - from concurrent.futures import ProcessPoolExecutor -except ImportError: - ProcessPoolExecutor = None from functools import partial __all__ = ["compile_dir","compile_file","compile_path"] @@ -70,9 +66,17 @@ def compile_dir(dir, maxlevels=10, ddir=None, force=False, rx=None, workers: maximum number of parallel workers invalidation_mode: how the up-to-dateness of the pyc will be checked """ - if workers is not None and workers < 0: - raise ValueError('workers must be greater or equal to 0') - + ProcessPoolExecutor = None + if workers is not None: + if workers < 0: + raise ValueError('workers must be greater or equal to 0') + elif workers != 1: + try: + # Only import when needed, as low resource platforms may + # fail to import it + from concurrent.futures import ProcessPoolExecutor + except ImportError: + workers = 1 files = _walk_dir(dir, quiet=quiet, maxlevels=maxlevels, ddir=ddir) success = True |