hooks: tensorflow: collect sources for tensorflow.python.autograph

Collect sources for `tensorflow.python.autograph` to avoid
run-time warning about AutoGraph being unavailable. Not sure if
we need to collect sources for other parts of `tensorflow`, though;
if that proves to be the case, we can adjust the collection mode
later.

src/_pyinstaller_hooks_contrib/hooks/stdhooks/hook-tensorflow.py

@@ -85,3 +85,12 @@ def _submodules_filter(x):
 # Suppress warnings for missing hidden imports generated by this hook.
 # Requires PyInstaller > 5.1 (with pyinstaller/pyinstaller#6914 merged); no-op otherwise.
 warn_on_missing_hiddenimports = False
+
+# Collect the AutoGraph part of `tensorflow` code, to avoid a run-time warning about AutoGraph being unavailable:
+# `WARNING:tensorflow:AutoGraph is not available in this environment: functions lack code information. ...`
+# The warning is emitted if source for `log` function from `tensorflow.python.autograph.utils.ag_logging` cannot be
+# looked up. Not sure if we need sources for other parts of `tesnorflow`, though.
+# Requires PyInstaller >= 5.3, no-op in older versions.
+module_collection_mode = {
+    'tensorflow.python.autograph': 'py+pyz',
+}