python list slice by list
Ever since Python 1.4, the slicing syntax has supported an optional third ``step'' or ... However, Python's built-in list, tuple, and string sequence types have never ... ,You can use * unpacking with zip() . >>> l = [(0,'a'), (1,'b'), (2,'c')] >>> for item in zip(*l)[0]: ... print item, ... 0 1 2. For Python 3, zip() doesn't produce a list ... ,>>> from operator import itemgetter >>> a = range(100) >>> itemgetter(5,13,25)(a) (5, 13, 25). ,The most direct way to do this with lists is to use a list comprehension: c = [b[i] for i in index]. But, depending on exactly what your data looks like and what else ... ,If you want to include the first element when reversing a list, leave the middle ... You can also find some good information about Python slices in general here: ,Slicing lists does not generate copies of the objects in the list; it just copies the ... Python provides no easy way to produce objects that are "views" into lists. ,that's what slice() is for: a = range(10) s = slice(2,4) print a[s]. That's the same as using a[2:4] . ,You can see that the first element of each of the 1-deep list is included in outlist ... But in outlist , these lists are then nested in one more 1-element list, so wrap ... ,You could, of course, transform numpy.array back to the list : ... Very rarely using slice objects is easier to read than employing a list comprehension, and this is ...
| 相關軟體 Light Alloy 資訊 | |
|---|---|
 python list slice by list 相關參考資料
15 Extended Slices
Ever since Python 1.4, the slicing syntax has supported an optional third ``step'' or ... However, Python's built-in list, tuple, and string sequence types have never ... https://docs.python.org How to slice a list of tuples in python? - Stack Overflow
You can use * unpacking with zip() . >>> l = [(0,'a'), (1,'b'), (2,'c')] >>> for item in zip(*l)[0]: ... print item, ... 0 1 2. For Python 3, zip() doesn'... https://stackoverflow.com Python List Slicing with Arbitrary Indices - Stack Overflow
>>> from operator import itemgetter >>> a = range(100) >>> itemgetter(5,13,25)(a) (5, 13, 25). https://stackoverflow.com Python: an efficient way to slice a list with a index list - Stack ...
The most direct way to do this with lists is to use a list comprehension: c = [b[i] for i in index]. But, depending on exactly what your data looks like and what else ... https://stackoverflow.com Reversing a list using slice notation - Stack Overflow
If you want to include the first element when reversing a list, leave the middle ... You can also find some good information about Python slices in general here: https://stackoverflow.com Slicing a list in Python without generating a copy - Stack Overflow
Slicing lists does not generate copies of the objects in the list; it just copies the ... Python provides no easy way to produce objects that are "views" into lists. https://stackoverflow.com Slicing a list using a variable, in Python - Stack Overflow
that's what slice() is for: a = range(10) s = slice(2,4) print a[s]. That's the same as using a[2:4] . https://stackoverflow.com Slicing a multidimensional list - Stack Overflow
You can see that the first element of each of the 1-deep list is included in outlist ... But in outlist , these lists are then nested in one more 1-element list, so wrap ... https://stackoverflow.com slicing list of lists in Python - Stack Overflow
You could, of course, transform numpy.array back to the list : ... Very rarely using slice objects is easier to read than employing a list comprehension, and this is ... https://stackoverflow.com |