Create aap.py

aap.py

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+from fastai.vision.all import *
+path = untar_data(URLs.PETS)/'images'
+def is_cat(x): return x[0].isupper() 
+dls = ImageDataLoaders.from_name_func('.',
+    get_image_files(path), valid_pct=0.2, seed=42,
+    label_func=is_cat,
+    item_tfms=Resize(192))
+learn = vision_learner(dls, resnet18, metrics=error_rate)
+learn.fine_tune(3)
+learn.export('model.pkl')