SDK/Lightweight - Added python version compatibility checks

See my compatibility analysis: cloudpipe/cloudpickle#293

sdk/python/kfp/components/_python_op.py

@@ -85,11 +85,23 @@ def _capture_function_code_using_cloudpickle(func, modules_to_capture: List[str]
     import cloudpickle as _cloudpickle
     print("cloudpickle loaded successfully after installing.", file=sys.stderr)
 
+pickler_python_version = {pickler_python_version}
+current_python_version = tuple(sys.version_info)
+if current_python_version[0] != pickler_python_version[0] or current_python_version[0] == 3 and pickler_python_version[1] < 6 and current_python_version[1] >= 6:
+    raise RuntimeError("Incompatible python versions: " + str(current_python_version) + " instead of " + str(pickler_python_version))
+
+if current_python_version != pickler_python_version:
+    print("Warning: Different python versions. The code may crash. Versions: " + str(current_python_version) + " instead of " + str(pickler_python_version), file=sys.stderr)
+
 import base64
 import pickle
 
 {func_name} = pickle.loads(base64.b64decode({func_pickle}))
-'''.format(func_name=func.__name__, func_pickle=repr(func_pickle))
+'''.format(
+        func_name=func.__name__,
+        func_pickle=repr(func_pickle),
+        pickler_python_version=repr(tuple(sys.version_info)),
+    )
 
     return function_loading_code