我很困惑为什么在更改关系运算符时我得到两个不同的输出:
这是不正确的版本:
listOne = [1,3,6,9,11]
listTwo = [2,4,5,7,8,10,12]
def mergeTwo(l1,l2):
output = []
while l1 and l2:
if l1[0] > l2[0]:
output.append(l2.pop(0))
output.append(l1.pop(0))
if l1:
output.extend(l1)
elif l2:
output.extend(l2)
print output
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输出是:
[1, 2, 3, 4, 6, 5, 9, 7, 11, 8, 10, 12]
但是当我这样做时它会起作用:
listOne = [1,3,6,9,11]
listTwo = [2,4,5,7,8,10,12]
def mergeTwo(l1,l2):
output = []
while l1 and l2:
if l1[0] < l2[0]:
output.append(l1.pop(0))
output.append(l2.pop(0))
if l1:
output.extend(l1)
elif l2:
output.extend(l2)
print output
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我将运算符更改为<和弹出的元素的顺序,我得到此输出:
[1, 2, 3, 4, 5, …Run Code Online (Sandbox Code Playgroud)