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Python Comprehension
Why Read this ?
If you ( like me ) are new to python and/or comprehension I hope this short tutorial will get you up to speed. In a nutshell, comprehension is a way to write concise ( short and effective) python code.
Much of comprehension in python deals with how you speak the language and much like your real language, you can say something with a lot of words (verbose) or say a lot with a few words (succinct).Even if you prefer verbose code ( I sometimes do ), concise code is widely used, so if you want to read others code it pays to learn about it, let’s start with a plain vanilla verbose example so we have something to work with.
""" Here we are simply populating a list """boxODonuts = []
FLAVORS = ['Glaze', 'Chocolate', 'Vanilla', 'Cinnamon']for flavor in FLAVORS:
boxODonuts.append(flavor + ' donut')print(boxODonuts)OUTPUT:
['Glaze donut', 'Chocolate donut', 'Vanilla donut', 'Cinnamon donut']
Let’s now do something to our donuts, like sample all of them
""" creating a temporary list, iterating over a list, doing something to each item
and replacing the original list with the modified elements"""tempBox = []
for donut in boxODonuts:
tempBox.append('Bitten ' + donut)
boxODonuts = tempBoxprint(boxODonuts)['Bitten Glaze donut', 'Bitten Chocolate donut', 'Bitten Vanilla donut', 'Bitten Cinnamon donut']
One last addition to our example is to encapsulate operations into a function, let’s say after sampling the donuts we decide we liked them all and we want to eat half of each, let’s do that :
""" Here we apply a simple function to each element of a list,
add them to a temporary copy and replace the…
