Lite: Don't pop value if they don't exist (#10613)

Lightning-AI · Nov 19, 2021 · 94390ab · 94390ab
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -150,6 +150,9 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 ### Fixed
 
 
+- Fixed LigtningLite `_wrap_init` popping unexisting keys from DataLoader signature parameters  ([#10613](https://github.com/PyTorchLightning/pytorch-lightning/pull/10613))
+
+
 - Fixed signals being registered within threads ([#10610](https://github.com/PyTorchLightning/pytorch-lightning/pull/10610))
 
 

diff --git a/pytorch_lightning/lite/wrappers.py b/pytorch_lightning/lite/wrappers.py
@@ -114,8 +114,8 @@ def _wrap_init(f: Callable) -> Callable:
     @functools.wraps(f)
     def wrapper(module: Any, *args: Any, **kwargs: Dict[str, Any]) -> None:
         params = dict(inspect.signature(module._old_init).parameters)
-        params.pop("args")
-        params.pop("kwargs")
+        params.pop("args", None)
+        params.pop("kwargs", None)
         for init_name, init_arg in chain(zip(params, args), kwargs.items()):
             setattr(module, init_name, init_arg)
         f(module, *args, **kwargs)