Python os.path.join 错误地附加路径

Question

python os 模块似乎错误地连接了路径。要复制，只需运行以下代码:

import os
p1 = "/1/2"
p2 = "/3/4"
print(os.path.join(p1,p2))

这将打印“/3/4”。这是预期的行为吗？我希望它打印 "/1/2/3/4"

Answer 1

That is by design :

If a component is an absolute path, all previous components are thrown away and joining continues from the absolute path component.

如果3/4应该是/1/2的子目录，则省略前导的/:

import os

p1 = "/1/2"
p2 = "3/4"
print(os.path.join(p1,p2))

如Olvin Roght suggests ，您还可以使用如下方式从 p2 中删除前导斜杠:

p2 = p2.lstrip("/\\")

如果无法直接修改字符串，则在尝试加入之前。这将从字符串中删除 / 或 \ 字符。