Update __init__.py

Author: nifflets

src/functions_framework/__init__.py

@@ -12,7 +12,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import distutils
 import functools
 import inspect
 import io
@@ -444,13 +443,10 @@ def _configure_app_execution_id_logging():
 
 
 def _enable_execution_id_logging():
+    # Based on distutils.util.strtobool
+    truthy_values = ('y', 'yes', 't', 'true', 'on', '1')
     env_var_value = os.environ.get("LOG_EXECUTION_ID")
-    if not env_var_value:
-        return False
-    try:
-        return bool(distutils.util.strtobool(env_var_value))
-    except ValueError:
-        return False
+    return env_var_value in truthy_values
 
 
 app = LazyWSGIApp()

tests/test_execution_id.py

@@ -46,7 +46,7 @@ def test_user_function_can_retrieve_execution_id_from_header():
 
 
 def test_uncaught_exception_in_user_function_sets_execution_id(capsys, monkeypatch):
-    monkeypatch.setenv("LOG_EXECUTION_ID", "True")
+    monkeypatch.setenv("LOG_EXECUTION_ID", "true")
     source = TEST_FUNCTIONS_DIR / "execution_id" / "main.py"
     target = "error"
     app = create_app(target, source)
@@ -64,7 +64,7 @@ def test_uncaught_exception_in_user_function_sets_execution_id(capsys, monkeypat
 
 
 def test_print_from_user_function_sets_execution_id(capsys, monkeypatch):
-    monkeypatch.setenv("LOG_EXECUTION_ID", "True")
+    monkeypatch.setenv("LOG_EXECUTION_ID", "true")
     source = TEST_FUNCTIONS_DIR / "execution_id" / "main.py"
     target = "print_message"
     app = create_app(target, source)
@@ -83,7 +83,7 @@ def test_print_from_user_function_sets_execution_id(capsys, monkeypatch):
 
 
 def test_log_from_user_function_sets_execution_id(capsys, monkeypatch):
-    monkeypatch.setenv("LOG_EXECUTION_ID", "True")
+    monkeypatch.setenv("LOG_EXECUTION_ID", "true")
     source = TEST_FUNCTIONS_DIR / "execution_id" / "main.py"
     target = "log_message"
     app = create_app(target, source)
@@ -321,7 +321,7 @@ def test_log_handler_omits_empty_execution_context(monkeypatch, capsys):
 
 @pytest.mark.asyncio
 async def test_maintains_execution_id_for_concurrent_requests(monkeypatch, capsys):
-    monkeypatch.setenv("LOG_EXECUTION_ID", "True")
+    monkeypatch.setenv("LOG_EXECUTION_ID", "true")
     monkeypatch.setattr(
         execution_id,
         "_generate_execution_id",