python - 创建一个循环将列表中的整数更改为另一个整数？

Question

如何获取数字列表

numList = []

while len(numList) <= 1000:
    numList.append(1)

while len(numList) <= 1000:
    numList.append(0)

print(numList)

现在我该如何将它们更改为 0？

for循环？

Answer 1

您不会更改添加的第一组元素。请参阅我添加到您的代码中的注释:

numList = []

while len(numList) <= 1000:
    numList.append(1)

# the numList is already a thousand elements long, so the while loop
# body is NEVER executed.
while len(numList) <= 1000:
    numList.append(0)

<小时/>

试试这个:

numList = []

while len(numList) <= 1000:
    numList.append(1)

for i in range(0, 1000):
    numList[i] = 0

print(numList)