Fixed the Timezone Parsing Regression

arrow/parser.py

@@ -888,7 +888,7 @@ class TzinfoParser:
     """
 
     _TZINFO_RE: ClassVar[Pattern[str]] = re.compile(
-        r"^(?:\(UTC)*([\+\-])?(\d{2})(?:\:?(\d{2}))?"
+        r"^(?:\(UTC)*([\+\-])?(\d{2})(?:\:?(\d{2}))?(?![0-9.:])"
     )
 
     @classmethod

test_arrow_get.py

@@ -0,0 +1,12 @@
+import arrow
+try:
+    a = arrow.get("+03:00.34")
+    print(f"Parsed '+03:00.34' as: {a}")
+except Exception as e:
+    print(f"Failed to parse '+03:00.34': {e}")
+
+try:
+    a = arrow.get("2023-10-10T10:00:00+03:00.34")
+    print(f"Parsed '2023-10-10T10:00:00+03:00.34' as: {a}")
+except Exception as e:
+    print(f"Failed to parse '2023-10-10T10:00:00+03:00.34': {e}")

test_reproduce.py

@@ -0,0 +1,10 @@
+import arrow
+from datetime import datetime
+
+try:
+    # Passing a string that contains a timezone but isn't a full datetime
+    # arrow.get('2023-10-10 10:00:00', tzinfo='+03:00.34')
+    a = arrow.get(datetime(2023, 10, 10), tzinfo='+03:00.34')
+    print(f"Parsed with tzinfo='+03:00.34' as: {a}")
+except Exception as e:
+    print(f"Failed with tzinfo='+03:00.34': {e}")

tests/test_parser.py

@@ -1330,6 +1330,14 @@ def test_parse_utc_withoffset(self):
             "(UTC+01:00) Amsterdam, Berlin, Bern, Rom, Stockholm, Wien"
         ) == timezone(timedelta(seconds=3600))
 
+    def test_parse_partial_offset_fail(self):
+        # Regression tests for issue where partial offsets were matched
+        with pytest.raises(parser.ParserError):
+            self.parser.parse("+03:00.34")
+
+        with pytest.raises(parser.ParserError):
+            self.parser.parse("+03005")
+
     def test_parse_iso(self):
         assert self.parser.parse("01:00") == timezone(timedelta(seconds=3600))
         assert self.parser.parse("11:35") == timezone(