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安裝中文字典英文字典辭典工具!
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- python - What is the difference between sorted(list) vs list. sort . . .
sorted() returns a new sorted list, leaving the original list unaffected list sort() sorts the list in-place, mutating the list indices, and returns None (like all in-place operations)
- What algorithm does pythons sorted () use? [duplicate]
Timsort was Python's standard sorting algorithm from version 2 3 to version 3 10 It is now also used to sort arrays in Java SE 7, and on the Android platform Since 3 11, Python uses Powersort, which was designed by Ian Munro and Sebastian Wild It is an improved nearly-optimal mergesort that adapts to existing runs of sorted data
- Python list sort in descending order - Stack Overflow
This is a strange answer because you do the sorting in-place but then the reversing out-of-place If there is another variable aliasing the original list, its value afterwards will not have the elements in their original order, nor in descending order; the alias will point at a list sorted in ascending order That could be rather surprising
- Does Python have an ordered set? - Stack Overflow
If you're using the ordered set to maintain a sorted order, consider using a sorted set implementation from PyPI The sortedcontainers module provides a SortedSet for just this purpose Some benefits: pure-Python, fast-as-C implementations, 100% unit test coverage, hours of stress testing Installing from PyPI is easy with pip:
- python - Sorting a set of values - Stack Overflow
Since Python 3 7, dicts keep insertion order So if you want to order a set but still want to be able to do membership checks in constant time, you can create a dictionary from the sorted list using dict fromkeys() (the values are None by default)
- What is the cleanest way to do a sort plus uniq on a Python list?
The straightforward solution is provided by Ignacio—sorted(set(foo)) If you have unique data, there's a reasonable chance you don't just want to do sorted(set( )) but rather to store a set all the time and occasionally pull out a sorted version of the values (At that point, it starts sounding like the sort of thing people often use a
- python - How do I sort a dictionary by key? - Stack Overflow
Standard Python dictionaries are unordered (until Python 3 7) Even if you sorted the (key,value) pairs, you wouldn't be able to store them in a dict in a way that would preserve the ordering The easiest way is to use OrderedDict, which remembers the order in which the elements have been inserted:
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