fix gradio on linux

app.py

@@ -1,24 +1,15 @@
 from fastai.vision.all import *
 import gradio as gr
 import pathlib
-import fastai.learner
-
-def custom_load_learner(fname, cpu=True, pickle_module=pickle):
-    """Load a Learner from file in `fname` and ensure it's using a platform-independent path."""
-    map_loc = None if torch.cuda.is_available() and not cpu else 'cpu'
-    try:
-        res = torch.load(fname, map_location=map_loc, pickle_module=pickle_module)
-    except ModuleNotFoundError as e:
-        raise ImportError(f"{e}. To load the model on a different device, you may need to install the fastai library.")
-    
-    if 'WindowsPath' in str(type(res.path)):
-        res.path = pathlib.Path(res.path)
-        
-    return res
+
+
+plt = platform.system()
+if plt == 'Linux': pathlib.WindowsPath = pathlib.PosixPath
+
 
 def is_cat(x): return x[0].isupper()
 
-learn = custom_load_learner('model.pkl')
+learn = load_learner('model.pkl')
 
 categories = ('dog', 'cat')