ValueError: invalid \x escape:

问题

ValueError: invalid \x escape:
  File "SConstruct", line 49:
    execfile("hosts.cfg")

I'm completely stumped with this one guys...

If I print right before line 49, I can see the output. On the very first line of "hosts.cfg" I put a second print statement which is never executed.

回答1:

Even on Windows, forward slashes should work for directory names, so you could standardize on those:

"libpath" : [".", "../xlib", "../tools", "../info"],

Or use raw strings, as @Adam Rosenfield already said in a comment:

"libpath" : [r".", r"..\xlib", r"..\tools", r"..\info"],

I think both of the above solutions are better than doubling all the backslashes, and loads better than just doubling backslashes for directory names that start with 'x'.

回答2:

"libpath" : [".", "..\xlib", "..\tools", "..\info"],

This was the problematic line inside hosts.cfg, don't know why Python kept complaining about the execfile line instead of the one inside the file I was calling.

I changed to:

\\xlib and it's working now.

来源：https://stackoverflow.com/questions/10559654/valueerror-invalid-x-escape