1.download "face-mask-detector" to your device,
2.also download the dataset folder (by your own) named "dataset"[which contains two folders "with_mask"(contains masked images) and "without_mask"(contains without masked images)] ,
3.put the "dataset" folder inside "face-mask-detector" folder,
4.finally upload "face-mask-detector" folder on your google drive.
5.then, copy paste the "colab_file" code on your google colab
6.and just run it