修改为东南天坐标系

backend_service/venv/lib/python3.13/site-packages/nltk/stem/api.py

@@ -0,0 +1,27 @@
+# Natural Language Toolkit: Stemmer Interface
+#
+# Copyright (C) 2001-2025 NLTK Project
+# Author: Trevor Cohn <tacohn@cs.mu.oz.au>
+#         Edward Loper <edloper@gmail.com>
+#         Steven Bird <stevenbird1@gmail.com>
+# URL: <https://www.nltk.org/>
+# For license information, see LICENSE.TXT
+
+from abc import ABCMeta, abstractmethod
+
+
+class StemmerI(metaclass=ABCMeta):
+    """
+    A processing interface for removing morphological affixes from
+    words.  This process is known as stemming.
+
+    """
+
+    @abstractmethod
+    def stem(self, token):
+        """
+        Strip affixes from the token and return the stem.
+
+        :param token: The token that should be stemmed.
+        :type token: str
+        """