bpo-41718: runpy now imports pkgutil in functions (GH-24996)
Reduce the number of modules imported by "python3 -m module".
The runpy module no longer imports at startup (in the module body),
but only in functions using it: _get_code_from_file() and run_path().
diff --git a/Lib/runpy.py b/Lib/runpy.py
index 7e1e1ac..caba121 100644
--- a/Lib/runpy.py
+++ b/Lib/runpy.py
@@ -16,7 +16,6 @@
import io
import types
import os
-from pkgutil import read_code, get_importer
__all__ = [
"run_module", "run_path",
@@ -233,6 +232,7 @@ def _get_main_module_details(error=ImportError):
def _get_code_from_file(run_name, fname):
# Check for a compiled file first
+ from pkgutil import read_code
decoded_path = os.path.abspath(os.fsdecode(fname))
with io.open_code(decoded_path) as f:
code = read_code(f)
@@ -255,6 +255,7 @@ def run_path(path_name, init_globals=None, run_name=None):
if run_name is None:
run_name = "<run_path>"
pkg_name = run_name.rpartition(".")[0]
+ from pkgutil import get_importer
importer = get_importer(path_name)
# Trying to avoid importing imp so as to not consume the deprecation warning.
is_NullImporter = False