cat_vs_dog_classifier_using_fastai.py

!pip install -Uqq fastbook
import fastbook
fastbook.setup_book()

from fastai.vision.all import *
path = untar_data(URLs.PETS)/'images'

def is_cat(x): return x[0].isupper()

dls = ImageDataLoaders.from_name_func(
    path, 
    get_image_files(path), 
    valid_pct=0.2, 
    seed=42,
    label_func=is_cat, 
    item_tfms=Resize(224)
)

learn = cnn_learner(dls, resnet34, metrics=error_rate)
learn.fine_tune(4)