Awesome one-liners (or little more)

• Breaking list into sublists (useful in files)

  • group consecutive z = [1,11,111, 2, 22, 222, 3, 33, 333]   zip([iter(z)]3)    [(1, 11, 111), (2, 22, 222), (3, 33, 333)]

  • group by position    [z[i::3] for i in range(3)]    [[1, 2, 3], [11, 22, 33], [111, 222, 333]]

• Most common item in the list

  • Using Collections Counter ` from collections import Counter Counter(lst).most_common(1)[0][0] `

  • Without using Counter Credit http://stackoverflow.com/a/1518632/1189865 ` def most_common(lst): return max(set(lst), key=lst.count) `

• Invert python dictionary

ans_to_ix = {v: k for k, v in dataset[u'ix_to_ans'].items()}

• Good Numpy Tutorial http://www.scipy-lectures.org/intro/numpy/numpy.html

Tutorials/Guides

• Jupyter Example notebooks: https://github.com/jupyter/jupyter/wiki/A-gallery-of-interesting-Jupyter-Notebooks