Merge pull request #14 from miwojc/correct-regex-link

Corrected regex link to python 3.6, was pyton 2

nbs/dl1/lesson1-pets.ipynb

@@ -139,7 +139,7 @@
    "source": [
     "The first thing we do when we approach a problem is to take a look at the data. We _always_ need to understand very well what the problem is and what the data looks like before we can figure out how to solve it. Taking a look at the data means understanding how the data directories are structured, what the labels are and what some sample images look like.\n",
     "\n",
-    "The main difference between the handling of image classification datasets is the way labels are stored. In this particular dataset, labels are stored in the filenames themselves. We will need to extract them to be able to classify the images into the correct categories. Fortunately, the fastai library has a handy function made exactly for this, `ImageDataBunch.from_name_re` gets the labels from the filenames using a [regular expression](https://docs.python.org/2/library/re.html)."
+    "The main difference between the handling of image classification datasets is the way labels are stored. In this particular dataset, labels are stored in the filenames themselves. We will need to extract them to be able to classify the images into the correct categories. Fortunately, the fastai library has a handy function made exactly for this, `ImageDataBunch.from_name_re` gets the labels from the filenames using a [regular expression](https://docs.python.org/3.6/library/re.html)."
    ]
   },
   {