编写一个 Python 程序,将列表向左旋转 n 次或N
个位置。在这个 Python 示例中,我们使用位置对列表进行切片,并使用算术+对其进行组合。
ltList = [5, 10, 15, 20, 25, 30, 35, 40, 45, 50]
ltRotate = int(input("Enter Position to Left Rotate List Items = "))
print('Original List Items Before Left Rotating')
print(ltList)
list2 = ltList[ltRotate:] + ltList[:ltRotate]
print('\nFinal List Items After Left Rotating')
print(list2)
这个 Python 程序使用 for 循环按照用户给定的位置向左旋转列表元素。
ltList = [11, 22, 33, 44, 55, 66, 77, 88]
ltRotate = int(input("Enter Position to Left Rotate List Items = "))
print('Original List Items Before Left Rotating')
print(ltList)
for i in range(ltRotate):
firstValue = ltList[0]
for j in range(len(ltList) - 1):
ltList[j] = ltList[j + 1]
ltList[len(ltList) - 1] = firstValue
print('Final List Items After Left Rotating')
print(ltList)
Enter Position to Left Rotate List Items = 6
Original List Items Before Left Rotating
[11, 22, 33, 44, 55, 66, 77, 88]
Final List Items After Left Rotating
[77, 88, 11, 22, 33, 44, 55, 66]
本 Python 示例允许用户输入列表大小、项目、旋转编号,并将列表项目向左旋转给定的编号。
def printListItems(ltList):
for i in range(len(ltList)):
print(ltList[i], end = ' ')
ltList = []
ltListTot = int(input("Total Number of Left Rotate List Items = "))
for i in range(1, ltListTot + 1):
ltListvalue = int(input("Please enter the %d List Item = " %i))
ltList.append(ltListvalue)
ltRotate = int(input("Enter Position to Left Rotate List Items = "))
print('\nOriginal List Items Before Left Rotating')
printListItems(ltList)
for i in range(ltRotate):
firstValue = ltList[0]
for j in range(len(ltList) - 1):
ltList[j] = ltList[j + 1]
ltList[len(ltList) - 1] = firstValue
print('\nFinal List Items After Left Rotating')
printListItems(ltList)
Total Number of Left Rotate List Items = 7
Please enter the 1 List Item = 30
Please enter the 2 List Item = 40
Please enter the 3 List Item = 50
Please enter the 4 List Item = 70
Please enter the 5 List Item = 90
Please enter the 6 List Item = 120
Please enter the 7 List Item = 180
Enter Position to Left Rotate List Items = 2
Original List Items Before Left Rotating
30 40 50 70 90 120 180
Final List Items After Left Rotating
50 70 90 120 180 30 40
Python 程序使用 while 循环向左旋转列表 n 次。
def printListItems(ltList):
i = 0
while i < len(ltList):
print(ltList[i], end = ' ')
i = i + 1
ltList = []
ltListTot = int(input("Total Number of Left Rotate List Items = "))
i = 1
while i <= ltListTot:
ltListvalue = int(input("Please enter the %d List Item = " %i))
ltList.append(ltListvalue)
i = i + 1
ltRotate = int(input("Enter Position to Left Rotate List Items = "))
print('\nOriginal List Items Before Left Rotating')
printListItems(ltList)
i = 0
while i < ltRotate:
firstValue = ltList[0]
j = 0
while j < len(ltList) - 1:
ltList[j] = ltList[j + 1]
j = j + 1
i = i + 1
ltList[len(ltList) - 1] = firstValue
print('\nFinal List Items After Left Rotating')
printListItems(ltList)
Total Number of Left Rotate List Items = 8
Please enter the 1 List Item = 23
Please enter the 2 List Item = 45
Please enter the 3 List Item = 67
Please enter the 4 List Item = 98
Please enter the 5 List Item = 89
Please enter the 6 List Item = 11
Please enter the 7 List Item = 16
Please enter the 8 List Item = 87
Enter Position to Left Rotate List Items = 3
Original List Items Before Left Rotating
23 45 67 98 89 11 16 87
Final List Items After Left Rotating
98 89 11 16 87 23 45 67