An example of python built-in variables

1. The simple explanation is: reverse a sequence object

Example 1:

def fun3():
x = [3,6,9]
for i in reversed(x):
print(i,end=',')
fun3()

Output:

》》》9 ,6,3,

Example 2:

>>> a = range(5)
>>> a
range(0, 5)
>>> list(a)
[0, 1, 2, 3, 4]
>>> a1 = reversed(a)
>>> list(a1)
[4, 3, 2, 1, 0]

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