Python Join无法正常工作

Question

Python 2代码：

healthamzn = "E:\ACADEMICS\PEC---\ME 4 SEM\code\data\amazon5core\healthcare"
jester = "E:\ACADEMICS\PEC---\ME 4 SEM\code\data\jester"

print(os.path.join(healthamzn, "healthcare5core.csv"))
print(os.path.join(jester,"jester_ratings.dat"))

输出：

E:\ACADEMICS\PEC---\ME 4 SEM\code\datamazon5core\healthcare\healthcare5core.csv E:\ACADEMICS\PEC---\ME 4 SEM\code\data\jester\jester_ratings.dat

请注意，第一个输出不是我期望的。

预期输出：

E:\ACADEMICS\PEC---\ME 4 SEM\code\data\amazon5core\healthcare\healthcare5core.csv