31–40 of 110 posts
> print(*more_numbers, sep=', ') This alone makes me appreciate print as a function in py3.
Now how much nicer would it be if even more things were functions, rather than special syntax like here? This can be done with an `apply`.
my favorite cheat is using locals() with string formatting something like this: def example_cheater(color, flavor, age): template = 'I am {age} years old and I like to wear {color} hats and eat {flavor} icecream' return template.format(**locals()) Obviously a contrived example, and it can be argued that using locals() is not very pythonic, but I think it makes the code look much nicer.
In python 3.6 and up, that becomes def example_cheater(color, flavor, age): return f'I am {age} years old and I like to wear {color} hats and eat {flavor} icecream' Even nicer!
This is one of those areas where I find Python a little contradictory. About 50% of the time it's "explicit is better than implicit" and "there should be one and only one good way" and then the other half of the time it's "here's this cool feature for doing something you could do a different way that looks like hieroglyphics and nobody understands but you should totally use it because it's awesome!
From the Zen of Python: > (...) Although practicality beats purity. https://www.python.org/dev/peps/pep-0020/
my favorite cheat is using locals() with string formatting something like this: def example_cheater(color, flavor, age): template = 'I am {age} years old and I like to wear {color} hats and eat {flavor} icecream' return template.format(**locals()) Obviously a contrived example, and it can be argued that using locals() is not very pythonic, but I think it makes the code look much nicer.
My favorite unpacking snippet is rotating a matrix >>> matrix = [(1,2,3),(4,5,6),(7,8,9)] >>> list(zip(*matrix)) [(1, 4, 7), (2, 5, 8), (3, 6, 9)] Not as readable as a real maths library, but pretty cool and educational. Think I came across it in Python in a nut shell, by Alex Martelli Edit: formatting
So this is like the rest and spread operator in javascript (`...`). An interesting observation is that while python has separate operators for lists ( * ) and dictionaries ( * * )—javascript has only `...`. > You need to be careful when using multiple times though. Functions in Python can’t have the same keyword argument specified multiple times, so the keys in each dictionary used with must be distinct or an excepti…
A := []int{1,2}
B := append(A, A...)
fmt.Println(B)
> [1, 2, 1, 2]I've been programming with Python for over a decade. I mostly understand, but I do try to avoid when possible for maximum clarity. Expanding function variables is fine and clear enough, but multiple levels deep in a comprehension and it can get pretty thick to try and keep it all straight. This article is nice that it covers all the patterns I've seen.
This is one of those areas where I find Python a little contradictory. About 50% of the time it's "explicit is better than implicit" and "there should be one and only one good way" and then the other half of the time it's "here's this cool feature for doing something you could do a different way that looks like hieroglyphics and nobody understands but you should totally use it because it's awesome!
How much Python experience do you have? I find that in places where it is applicable, this syntax is clear, unambiguous, easy to read, overall much nicer than alternatives.
This is one of those areas where I find Python a little contradictory. About 50% of the time it's "explicit is better than implicit" and "there should be one and only one good way" and then the other half of the time it's "here's this cool feature for doing something you could do a different way that looks like hieroglyphics and nobody understands but you should totally use it because it's awesome!
This is one of the things that gets me about Python. It makes this big noise about being a super-friendly form of executable pseudocode, but then you open any code example and the first thing you see is two asterisks and the mysterious word "kwargs" (a Swedish dessert perhaps?). I wouldn't mind except for all the haughty pretense about Python being a language that doesn't do this sort of thing. Dear Python, get a gri…
So this is like the rest and spread operator in javascript (`...`). An interesting observation is that while python has separate operators for lists ( * ) and dictionaries ( * * )—javascript has only `...`. > You need to be careful when using multiple times though. Functions in Python can’t have the same keyword argument specified multiple times, so the keys in each dictionary used with must be distinct or an excepti…
This is one of those areas where I find Python a little contradictory. About 50% of the time it's "explicit is better than implicit" and "there should be one and only one good way" and then the other half of the time it's "here's this cool feature for doing something you could do a different way that looks like hieroglyphics and nobody understands but you should totally use it because it's awesome!
This is one of the things that gets me about Python. It makes this big noise about being a super-friendly form of executable pseudocode, but then you open any code example and the first thing you see is two asterisks and the mysterious word "kwargs" (a Swedish dessert perhaps?). I wouldn't mind except for all the haughty pretense about Python being a language that doesn't do this sort of thing. Dear Python, get a gri…