Integrate PEP 405

Lib/tkinter/_fix.py

 import sys, os
 
 # Delay import _tkinter until we have set TCL_LIBRARY,
 # so that Tcl_FindExecutable has a chance to locate its
 # encoding directory.
 
 # Unfortunately, we cannot know the TCL_LIBRARY directory
 # if we don't know the tcl version, which we cannot find out
 # without import Tcl. Fortunately, Tcl will itself look in
 # <TCL_LIBRARY>\..\tcl<TCL_VERSION>, so anything close to
@@ skipping 28 matching lines @@
             # Conversion failed (e.g. network location)
             return s
         s = buf[:res]
         # Ignore leading \\?\
         if s.startswith("\\\\?\\"):
             s = s[4:]
         if s.startswith("UNC"):
             s = "\\" + s[3:]
         return s
 
-prefix = os.path.join(sys.prefix,"tcl")
+prefix = os.path.join(sys.base_prefix,"tcl")
 if not os.path.exists(prefix):
     # devdir/../tcltk/lib
-    prefix = os.path.join(sys.prefix, os.path.pardir, "tcltk", "lib")
+    prefix = os.path.join(sys.base_prefix, os.path.pardir, "tcltk", "lib")
     prefix = os.path.abspath(prefix)
 # if this does not exist, no further search is needed
 if os.path.exists(prefix):
     prefix = convert_path(prefix)
     if "TCL_LIBRARY" not in os.environ:
         for name in os.listdir(prefix):
             if name.startswith("tcl"):
                 tcldir = os.path.join(prefix,name)
                 if os.path.isdir(tcldir):
                     os.environ["TCL_LIBRARY"] = tcldir
     # Compute TK_LIBRARY, knowing that it has the same version
     # as Tcl
     import _tkinter
     ver = str(_tkinter.TCL_VERSION)
     if "TK_LIBRARY" not in os.environ:
         v = os.path.join(prefix, 'tk'+ver)
         if os.path.exists(os.path.join(v, "tclIndex")):
             os.environ['TK_LIBRARY'] = v
     # We don't know the Tix version, so we must search the entire
     # directory
     if "TIX_LIBRARY" not in os.environ:
         for name in os.listdir(prefix):
             if name.startswith("tix"):
                 tixdir = os.path.join(prefix,name)
                 if os.path.isdir(tixdir):
                     os.environ["TIX_LIBRARY"] = tixdir