Message12752

E:\>c:\jython2.7.2b2\bin\jython.exe
Jython 2.7.2b2 (v2.7.2b2:b9b60766cabe, Nov 1 2019, 07:46:45)
[Java HotSpot(TM) Client VM (Oracle Corporation)] on java1.8.0_231
Type "help", "copyright", "credits" or "license" for more information.
>>> import os
>>> os.path.abspath(r'foo\bar')
'E:\\foo\\bar'
>>> os.path.abspath(r'\foo\bar')
'\\foo\\bar'
>>>

With CPython and with Jython 2.7.0 also the latter result has the drive letter.