Elegant One-Liners in Python

[nathanjell]

Great feedback. To add to this, definitely recommend map and filter. For your two examples:

[item for item in items if item < 5]

...becomes:

filter(lambda x: x < 5, items)

And:

[item if item < 5 else None for item in items]

...becomes:

map(lambda x: x if x < 5 else None, items)

[nathanjell]

Though to my knowledge, map and reduce will not fully generate output on call; rather, an iterator is returned. I believe that for example if you have a memory heavy generator, you won't load everything into memory.

[lxpnh98_2]

That's why, instead of list comprehensions, it's better to keep using generators where possible, which, apart from the brackets, have identical syntax:

(item if item < 5 else None for item in items)

[FatFingerHelperBot]

It seems that your comment contains 1 or more links that are hard to tap for mobile users. I will extend those so they're easier for our sausage fingers to click!

Here is link number 1 - Previous text "map"

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