str.fullmatch() and str.match() with complied regex fix issue 61952

Author: Khemkaran

pandas/core/arrays/_arrow_string_mixins.py

@@ -304,11 +304,14 @@ def _str_contains(
 
     def _str_match(
         self,
-        pat: str,
+        pat,
         case: bool = True,
         flags: int = 0,
         na: Scalar | lib.NoDefault = lib.no_default,
     ):
+        if isinstance(pat, re.Pattern):
+            # GH#61952
+            pat = pat.pattern
         if not pat.startswith("^"):
             pat = f"^{pat}"
         return self._str_contains(pat, case, flags, na, regex=True)
@@ -320,6 +323,9 @@ def _str_fullmatch(
         flags: int = 0,
         na: Scalar | lib.NoDefault = lib.no_default,
     ):
+        if isinstance(pat, re.Pattern):
+            # GH#61952
+            pat = pat.pattern
         if not pat.endswith("$") or pat.endswith("\\$"):
             pat = f"{pat}$"
         return self._str_match(pat, case, flags, na)

pandas/tests/extension/test_arrow.py

@@ -1857,6 +1857,10 @@ def test_str_repeat():
         ["ab", False, True, [True, True]],
         ["a[a-z]{1}", False, None, [True, None]],
         ["A[a-z]{1}", True, None, [False, None]],
+        # GH#61952
+        [re.compile(r"ab"), False, None, [True, None]],
+        [re.compile(r"Abc"), True, None, [False, None]],
+        [re.compile(r"a[a-z]{1}"), False, None, [True, None]],
     ],
 )
 def test_str_match(pat, case, na, exp):
@@ -1880,6 +1884,10 @@ def test_str_match(pat, case, na, exp):
         ["abc\\$", False, None, [False, True, False, None]],
         ["Abc$", True, None, [False, False, False, None]],
         ["Abc\\$", True, None, [False, False, False, None]],
+        # GH#61952
+        [re.compile(r"abc"), False, None, [True, True, False, None]],
+        [re.compile(r"abc$"), False, None, [True, False, False, None]],
+        [re.compile(r"a[a-z]{2}"), False, None, [True, True, False, None]],
     ],
 )
 def test_str_fullmatch(pat, case, na, exp):