Optimize usage of re. methods (#741)

Author: eumiro

src/pendulum/formatting/formatter.py

@@ -377,8 +377,7 @@ def parse(
         """
         escaped_fmt = re.escape(fmt)
 
-        tokens = self._FROM_FORMAT_RE.findall(escaped_fmt)
-        if not tokens:
+        if not self._FROM_FORMAT_RE.search(escaped_fmt):
             raise ValueError("The given time string does not match the given format")
 
         if not locale:
@@ -406,7 +405,7 @@ def parse(
             lambda m: self._replace_tokens(m.group(0), loaded_locale), escaped_fmt
         )
 
-        if not re.search("^" + pattern + "$", time):
+        if not re.fullmatch(pattern, time):
             raise ValueError(f"String does not match format {fmt}")
 
         def _get_parsed_values(m: Match[str]) -> Any:

src/pendulum/locales/locale.py

@@ -48,7 +48,7 @@ def load(cls, locale: str | Locale) -> Locale:
 
     @classmethod
     def normalize_locale(cls, locale: str) -> str:
-        m = re.match("([a-z]{2})[-_]([a-z]{2})", locale, re.I)
+        m = re.fullmatch("([a-z]{2})[-_]([a-z]{2})", locale, re.I)
         if m:
             return f"{m.group(1).lower()}_{m.group(2).lower()}"
         else:

src/pendulum/parsing/__init__.py

@@ -140,7 +140,7 @@ def _parse_common(text: str, **options: Any) -> datetime | date | time:
 
     :param text: The string to parse.
     """
-    m = COMMON.match(text)
+    m = COMMON.fullmatch(text)
     has_date = False
     year = 0
     month = 1

src/pendulum/parsing/iso8601.py

@@ -97,7 +97,7 @@ def parse_iso8601(
     if parsed is not None:
         return parsed
 
-    m = ISO8601_DT.match(text)
+    m = ISO8601_DT.fullmatch(text)
     if not m:
         raise ParserError("Invalid ISO 8601 string")
 
@@ -264,7 +264,7 @@ def parse_iso8601(
 
 
 def _parse_iso8601_duration(text: str, **options: str) -> Duration | None:
-    m = ISO8601_DURATION.match(text)
+    m = ISO8601_DURATION.fullmatch(text)
     if not m:
         return None