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The values just before and once the assigned slice is going to be kept, and the gathering will shrink or improve to include the new values:
Shawn ChinShawn Chin 87.2k2020 gold badges168168 silver badges193193 bronze badges 5 28 The * would be the difficult factor that makes chain much less easy as opposed to list comprehension. You will need to recognize that chain only joins jointly the iterables handed as parameters, as well as the * triggers the very best-stage list for being expanded into parameters, so chain joins alongside one another all These iterables, but won't descend more. I feel this would make the comprehension more readable than the usage of chain In cases like this.
Slicing is like working with boxes on their own. You can pick up the main box and put it on An additional table. To choose up the box, all you need to know may be the position of beginning and ending of the box.
This tactic is arguably more readable than [merchandise for sublist in l for product in sublist] and seems to become a lot quicker too:
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156 This is a good looking remedy Along with the votes to establish it, however it misses one thing: you could substitute None for almost any from the empty spaces. Such as [None:None] can make a whole duplicate. This is beneficial when you need to specify the top of the array using a variable and want to include the final item.
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You may make any of those good or destructive numbers. The indicating with the good numbers is easy, but for negative figures, identical to indexes in Python, you rely backwards in the conclusion for the beginning
And so the position for the empty slice assignment is definitely the rational extension of the positions with the non-vacant slice assignments.
This does also do the job for any depth of nesting and This is a lazy iterator which yields the goods as asked for:
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The 3rd rule of slice assignment is, the assigned list (iterable) doesn't have to hold the very same length; the indexed slice is actually sliced out and changed en masse by whatever is becoming assigned: