On OSX, the PATH environment variable may contain non-ASCII characters; python/which/which.py should handle those.

OSX PATH encoding

diff --git a/python/which/which.py b/python/which/which.py
--- a/python/which/which.py
+++ b/python/which/which.py
@@ -158,16 +158,18 @@ def whichgen(command, path=None, verbose
     command>, <where path found>).
     """
     matches = []
     if path is None:
         usingGivenPath = 0
         path = os.environ.get("PATH", "").split(os.pathsep)
         if sys.platform.startswith("win"):
             path.insert(0, os.curdir)  # implied by Windows shell
+        if sys.platform == "darwin":
+            path = unicode(path, 'utf-8')
     else:
         usingGivenPath = 1
 
     # Windows has the concept of a list of extensions (PATHEXT env var).
     if sys.platform.startswith("win"):
         if exts is None:
             exts = os.environ.get("PATHEXT", "").split(os.pathsep)
             # If '.exe' is not in exts then obviously this is Win9x and