如何反序的迭代一个序列?how do I iterate over a sequence in reverse order
如果是一个list, 最快的解决方案是:
list.reverse()
try:
for x in list:
“do something with x”
finally:
list.reverse()
如果不是list, 最通用但是稍慢的解决方案是:
for i in range(len(sequence)-1, -1, -1):
x = sequence[i]
list.reverse()
try:
for x in list:
“do something with x”
finally:
list.reverse()
如果不是list, 最通用但是稍慢的解决方案是:
for i in range(len(sequence)-1, -1, -1):
x = sequence[i]
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