[issue1578269] Add os.link() and os.symlink() and os.path.islink() support for Windows

[Gabriel Genellina]

Changes by Gabriel Genellina <gagsl-py2 at yahoo.com.ar>:


----------
nosy: +gagenellina

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue1578269>
_______________________________________