There's likely a way to escape the backslash, but I just did a substitution.

testing inside the Python shell (omitting earlier steps):

>>>myDataDir = myDataDir.replace("\\", "/") # escape the backslash in the command

>>>os.chdir(myDataDir)

Easy, peasy.

Your solution works, too:

>>> myDataDir = "c:\\data\\00-LatestData"
>>> os.chdir(myDataDir)
>>> print os.getcwd()
c:\data\00-LatestData
>>>

There may even a 'os' method to give the 'myDataDir' already pre-escaped; no doubt this has come up before... But I learned some things with my adventures today, so it's all good.

Thanks.

Cheers,
Scott.