1, the reversed built-in function ()
li =[1, 2, 3, 4, 5, 6]
a = list(reversed(li))
print (a)Note: reversed () function returns an iterator instead of a List, you need to change if the function list
2, built-in function sorted ()
sorted () syntax
sorted(iterable[, cmp[, key[, reverse]]])Parameter Description:
- iterable - iterables.
- cmp - compare function, the two parameters, parameter values are taken from the subject may be iterative, this function must comply with the rules is greater than 1 is returned, it is less than -1, is equal to 0 is returned.
- key - is mainly used for the comparison element, only one parameter, the specific parameter is a function of iteration may be taken from the object, specify one of the elements in the iteration to be sorted.
- reverse - collation, reverse = True descending, reverse = False ascending (default).
The return value
is returned to reorder the list.
'''
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a=[1,2,3,4,5,6,7,8,9]
c=sorted(a, reverse=True)
print (c)Note: sorted () in descending order, no effect for the content is not reversed order, for improvement here.
3: Using fragment
a=[1,2,3,4,5,6,7,8,9]
d=a[::-1]
print （d） Note: wherein [:: --1] Representative values from back to front, each step value 1