some new features

.venv/lib/python3.12/site-packages/holidays/countries/french_guiana.py

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+#  holidays
+#  --------
+#  A fast, efficient Python library for generating country, province and state
+#  specific sets of holidays on the fly. It aims to make determining whether a
+#  specific date is a holiday as fast and flexible as possible.
+#
+#  Authors: Vacanza Team and individual contributors (see CONTRIBUTORS file)
+#           dr-prodigy <dr.prodigy.github@gmail.com> (c) 2017-2023
+#           ryanss <ryanssdev@icloud.com> (c) 2014-2017
+#  Website: https://github.com/vacanza/holidays
+#  License: MIT (see LICENSE file)
+
+from holidays.countries.france import France
+from holidays.mixins.child_entity import ChildEntity
+
+
+class HolidaysGF(ChildEntity, France):
+    """French Guiana holidays.
+
+    Alias of a French subdivision that is also officially assigned
+    its own country code in ISO 3166-1.
+
+    References:
+        * <https://en.wikipedia.org/wiki/French_Guiana>
+        * <https://en.wikipedia.org/wiki/Public_holidays_in_France>
+    """
+
+    country = "GF"
+    parent_entity = France
+    parent_entity_subdivision_code = "973"
+    # Cession from Portugal on May 30th, 1814.
+    start_year = 1815
+
+
+class FrenchGuiana(HolidaysGF):
+    pass
+
+
+class GF(HolidaysGF):
+    pass
+
+
+class GUF(HolidaysGF):
+    pass