Add sgreek and latin alphabets as set

devRD · devRD · commit 05a32616aaa6 · 2023-06-26T21:12:34.000+05:30
diff --git a/lib/matplotlib/_mathtext.py b/lib/matplotlib/_mathtext.py
@@ -1812,6 +1812,11 @@ class _MathStyle(enum.Enum):
     _right_delims = set(r") ] \} > \rfloor \rangle \rceil".split())
     _delims = _left_delims | _right_delims | _ambi_delims
 
+    _small_greek = set([unicodedata.name(chr(i)).split()[-1].lower() for i in
+                       range(ord('\N{GREEK SMALL LETTER ALPHA}'),
+                             ord('\N{GREEK SMALL LETTER OMEGA}') + 1)])
+    _latin_alphabets = set(string.ascii_letters)
+
     def __init__(self):
         p = types.SimpleNamespace()
 
@@ -2630,10 +2635,6 @@ def auto_delim(self, s, loc, toks):
     def boldsymbol(self, s, loc, toks):
         self.push_state()
         state = self.get_state()
-        small_greek = [unicodedata.name(chr(i)).split()[-1].lower() for i in
-                           range(ord('\N{GREEK SMALL LETTER ALPHA}'),
-                                 ord('\N{GREEK SMALL LETTER OMEGA}') + 1)]
-        latin_alphabets = string.ascii_letters
         hlist = []
         name = toks["value"]
         for c in name:
@@ -2642,9 +2643,11 @@ def boldsymbol(self, s, loc, toks):
                 if isinstance(k, Char):
                     k.font = "bf"
                     k._update_metrics()
-            if isinstance(c, Char):
+                hlist.append(c)
+            elif isinstance(c, Char):
                 c.font = "bf"
-                if c.c in latin_alphabets or c.c[1:] in small_greek:
+                if (c.c in self._latin_alphabets or
+                   c.c[1:] in self._small_greek):
                     c.font = "bfit"
                     c._update_metrics()
                 c._update_metrics()
