feat: update regex splitter

semantic_chunkers/__init__.py

@@ -11,8 +11,8 @@
     "ConsecutiveChunker",
     "CumulativeChunker",
     "StatisticalChunker",
-    "BaseSplitter",
     "RegexSplitter",
+    "BaseSplitter",
 ]
 
 __version__ = "0.0.8"

semantic_chunkers/chunkers/consecutive.py

@@ -7,7 +7,7 @@
 from semantic_chunkers.chunkers.base import BaseChunker
 from semantic_chunkers.schema import Chunk
 from semantic_chunkers.splitters.base import BaseSplitter
-from semantic_chunkers.splitters.sentence import RegexSplitter
+from semantic_chunkers.splitters.regex import RegexSplitter
 
 
 class ConsecutiveChunker(BaseChunker):

semantic_chunkers/chunkers/cumulative.py

@@ -7,7 +7,7 @@
 from semantic_chunkers.chunkers.base import BaseChunker
 from semantic_chunkers.schema import Chunk
 from semantic_chunkers.splitters.base import BaseSplitter
-from semantic_chunkers.splitters.sentence import RegexSplitter
+from semantic_chunkers.splitters.regex import RegexSplitter
 
 
 class CumulativeChunker(BaseChunker):

semantic_chunkers/chunkers/statistical.py

@@ -9,7 +9,7 @@
 from semantic_chunkers.chunkers.base import BaseChunker
 from semantic_chunkers.schema import Chunk
 from semantic_chunkers.splitters.base import BaseSplitter
-from semantic_chunkers.splitters.sentence import RegexSplitter
+from semantic_chunkers.splitters.regex import RegexSplitter
 from semantic_chunkers.utils.logger import logger
 from semantic_chunkers.utils.text import (
     async_retry_with_timeout,

semantic_chunkers/splitters/__init__.py

@@ -1,5 +1,5 @@
 from semantic_chunkers.splitters.base import BaseSplitter
-from semantic_chunkers.splitters.sentence import RegexSplitter
+from semantic_chunkers.splitters.regex import RegexSplitter
 
 __all__ = [
     "BaseSplitter",

semantic_chunkers/splitters/sentence.py → semantic_chunkers/splitters/regex.py

@@ -52,6 +52,18 @@ class RegexSplitter(BaseSplitter):
     """
 
     def __call__(self, doc: str) -> List[str]:
-        sentences = regex.split(self.regex_pattern, doc, flags=regex.VERBOSE)
-        sentences = [sentence.strip() for sentence in sentences if sentence.strip()]
+        # Step 1: Split by \n\n
+        chunks = doc.split("\n\n")
+        sentences = []
+        for chunk in chunks:
+            # Step 2: Split by \n within each chunk
+            sub_chunks = chunk.split("\n")
+            for sub_chunk in sub_chunks:
+                # Step 3: Split by regex pattern within each sub_chunk
+                sub_sentences = regex.split(
+                    self.regex_pattern, sub_chunk, flags=regex.VERBOSE
+                )
+                for sentence in sub_sentences:
+                    if sentence.strip():
+                        sentences.append(sentence.strip())
         return sentences

tests/unit/test_regex_splitter.py

@@ -0,0 +1,43 @@
+import unittest
+
+from semantic_chunkers.splitters.regex import RegexSplitter
+
+
+class TestRegexSplitter(unittest.TestCase):
+    def setUp(self):
+        self.splitter = RegexSplitter()
+
+    def test_split_by_double_newline(self):
+        doc = "This is the first paragraph.\n\nThis is the second paragraph."
+        expected = ["This is the first paragraph.", "This is the second paragraph."]
+        result = self.splitter(doc)
+        self.assertEqual(result, expected)
+
+    def test_split_by_single_newline(self):
+        doc = "This is the first line.\nThis is the second line."
+        expected = ["This is the first line.", "This is the second line."]
+        result = self.splitter(doc)
+        self.assertEqual(result, expected)
+
+    def test_split_by_period(self):
+        doc = "This is the first sentence. This is the second sentence."
+        expected = ["This is the first sentence.", "This is the second sentence."]
+        result = self.splitter(doc)
+        self.assertEqual(result, expected)
+
+    def test_complex_split(self):
+        doc = """
+        First paragraph.\n\nSecond paragraph.\nThird line in second paragraph. Fourth line.\n\nFifth paragraph."""
+        expected = [
+            "First paragraph.",
+            "Second paragraph.",
+            "Third line in second paragraph.",
+            "Fourth line.",
+            "Fifth paragraph.",
+        ]
+        result = self.splitter(doc)
+        self.assertEqual(result, expected)
+
+
+if __name__ == "__main__":
+    unittest.main()