Fixed #32892 -- Optimized django.utils.dateparse functions by using fromisoformat().

django/utils/dateparse.py

@@ -72,8 +72,10 @@ def parse_date(value):
     Raise ValueError if the input is well formatted but not a valid date.
     Return None if the input isn't well formatted.
     """
-    match = date_re.match(value)
-    if match:
+    try:
+        return datetime.date.fromisoformat(value)
+    except ValueError:
+        if match := date_re.match(value):
             kw = {k: int(v) for k, v in match.groupdict().items()}
             return datetime.date(**kw)
 
@@ -87,8 +89,14 @@ def parse_time(value):
     Return None if the input isn't well formatted, in particular if it
     contains an offset.
     """
-    match = time_re.match(value)
-    if match:
+    try:
+        # The fromisoformat() method takes time zone info into account and
+        # returns a time with a tzinfo component, if possible. However, there
+        # are no circumstances where aware datetime.time objects make sense, so
+        # remove the time zone offset.
+        return datetime.time.fromisoformat(value).replace(tzinfo=None)
+    except ValueError:
+        if match := time_re.match(value):
             kw = match.groupdict()
             kw['microsecond'] = kw['microsecond'] and kw['microsecond'].ljust(6, '0')
             kw = {k: int(v) for k, v in kw.items() if v is not None}
@@ -104,8 +112,10 @@ def parse_datetime(value):
     Raise ValueError if the input is well formatted but not a valid datetime.
     Return None if the input isn't well formatted.
     """
-    match = datetime_re.match(value)
-    if match:
+    try:
+        return datetime.datetime.fromisoformat(value)
+    except ValueError:
+        if match := datetime_re.match(value):
             kw = match.groupdict()
             kw['microsecond'] = kw['microsecond'] and kw['microsecond'].ljust(6, '0')
             tzinfo = kw.pop('tzinfo')
@@ -118,8 +128,7 @@ def parse_datetime(value):
                     offset = -offset
                 tzinfo = get_fixed_timezone(offset)
             kw = {k: int(v) for k, v in kw.items() if v is not None}
-        kw['tzinfo'] = tzinfo
-        return datetime.datetime(**kw)
+            return datetime.datetime(**kw, tzinfo=tzinfo)
 
 
 def parse_duration(value):