Fixed tests with Tcl/Tk <8.5 (closes #18964).

Lib/test/test_tcl.py

@@ -15,6 +15,14 @@ support.import_fresh_module('tkinter')
 from tkinter import Tcl
 from _tkinter import TclError
 
+tcl_version = _tkinter.TCL_VERSION.split('.')
+try:
+    for i in range(len(tcl_version)):
+        tcl_version[i] = int(tcl_version[i])
+except ValueError:
+    pass
+tcl_version = tuple(tcl_version)
+
 
 class TkinterTest(unittest.TestCase):
 
@@ -200,6 +208,9 @@ class TclTest(unittest.TestCase):
             (('a', 3.4), ('a', 3.4)),
             ((), ()),
             (call('list', 1, '2', (3.4,)), (1, '2', (3.4,))),
+        ]
+        if tcl_version >= (8, 5):
+            testcases += [
                 (call('dict', 'create', 1, '\u20ac', b'\xe2\x82\xac', (3.4,)),
                         (1, '\u20ac', '\u20ac', (3.4,))),
             ]
@@ -234,6 +245,9 @@ class TclTest(unittest.TestCase):
             (('a', (2, 3.4)), ('a', (2, 3.4))),
             ((), ()),
             (call('list', 1, '2', (3.4,)), (1, '2', (3.4,))),
+        ]
+        if tcl_version >= (8, 5):
+            testcases += [
                 (call('dict', 'create', 12, '\u20ac', b'\xe2\x82\xac', (3.4,)),
                         (12, '\u20ac', '\u20ac', (3.4,))),
             ]