Fixed full Tcl version parsing in tests for pre-final versions.

1 files changed, 10 insertions, 10 deletions

diff --git a/Lib/tkinter/test/support.py b/Lib/tkinter/test/support.py
index 067fc71c8f..52df104003 100644
--- a/Lib/tkinter/test/support.py
+++ b/Lib/tkinter/test/support.py
@@ -1,7 +1,6 @@
-import sys
+import re
 import tkinter
 import unittest
-from test.support import requires
 
 class AbstractTkTest:
 
@@ -63,14 +62,15 @@ def get_tk_patchlevel():
     global _tk_patchlevel
     if _tk_patchlevel is None:
         tcl = tkinter.Tcl()
-        patchlevel = []
-        for x in tcl.call('info', 'patchlevel').split('.'):
-            try:
-                x = int(x, 10)
-            except ValueError:
-                x = -1
-            patchlevel.append(x)
-        _tk_patchlevel = tuple(patchlevel)
+        patchlevel = tcl.call('info', 'patchlevel')
+        m = re.fullmatch(r'(\d+)\.(\d+)([ab.])(\d+)', patchlevel)
+        major, minor, releaselevel, serial = m.groups()
+        major, minor, serial = int(major), int(minor), int(serial)
+        releaselevel = {'a': 'alpha', 'b': 'beta', '.': 'final'}[releaselevel]
+        if releaselevel == 'final':
+            _tk_patchlevel = major, minor, serial, releaselevel, 0
+        else:
+            _tk_patchlevel = major, minor, 0, releaselevel, serial
     return _tk_patchlevel
 
 units = {