gh-91827: Add method info_pathlevel() in tkinter (GH-91829)

Lib/tkinter/__init__.py

@@ -30,6 +30,7 @@ button.pack(side=BOTTOM)
 tk.mainloop()
 """
 
+import collections
 import enum
 import sys
 import types
@@ -143,6 +144,28 @@ def _splitdict(tk, v, cut_minus=True, conv=None):
         dict[key] = value
     return dict
 
+class _VersionInfoType(collections.namedtuple('_VersionInfoType',
+        ('major', 'minor', 'micro', 'releaselevel', 'serial'))):
+    def __str__(self):
+        if self.releaselevel == 'final':
+            return f'{self.major}.{self.minor}.{self.micro}'
+        else:
+            return f'{self.major}.{self.minor}{self.releaselevel[0]}{self.serial}'
+
+def _parse_version(version):
+    import re
+    m = re.fullmatch(r'(\d+)\.(\d+)([ab.])(\d+)', version)
+    major, minor, releaselevel, serial = m.groups()
+    major, minor, serial = int(major), int(minor), int(serial)
+    if releaselevel == '.':
+        micro = serial
+        serial = 0
+        releaselevel = 'final'
+    else:
+        micro = 0
+        releaselevel = {'a': 'alpha', 'b': 'beta'}[releaselevel]
+    return _VersionInfoType(major, minor, micro, releaselevel, serial)
+
 
 @enum._simple_enum(enum.StrEnum)
 class EventType:
@@ -1055,6 +1078,11 @@ class Misc:
 
     lift = tkraise
 
+    def info_patchlevel(self):
+        """Returns the exact version of the Tcl library."""
+        patchlevel = self.tk.call('info', 'patchlevel')
+        return _parse_version(patchlevel)
+
     def winfo_atom(self, name, displayof=0):
         """Return integer which represents atom NAME."""
         args = ('winfo', 'atom') + self._displayof(displayof) + (name,)