fix pure Python fallback

CHANGELOG.md

@@ -1,5 +1,9 @@
 ## Changelog
 
+### [2.4.2] - 2022-07-30
+#### Fixed
+- add missing symbol to pure Python which made the usage impossible
+
 ### [2.4.1] - 2022-07-29
 #### Fixed
 - fix version number

docs/conf.py

@@ -22,7 +22,7 @@
 author = 'Max Bachmann'
 
 # The full version, including alpha/beta/rc tags
-release = '2.4.1'
+release = '2.4.2'
 
 
 # -- General configuration ---------------------------------------------------

setup.py

@@ -11,7 +11,7 @@ def show_message(*lines):
 
 setup_args = {
     "name": "rapidfuzz",
-    "version": "2.4.1",
+    "version": "2.4.2",
     "install_requires": ["jarowinkler >= 1.2.0, < 2.0.0"],
     "extras_require": {'full': ['numpy']},
     "url": "https://github.com/maxbachmann/RapidFuzz",

src/rapidfuzz/__init__.py

@@ -3,6 +3,6 @@
 """
 __author__: str = "Max Bachmann"
 __license__: str = "MIT"
-__version__: str = "2.4.1"
+__version__: str = "2.4.2"
 
 from rapidfuzz import process, distance, fuzz, string_metric, utils

src/rapidfuzz/distance/_initialize_py.py

@@ -1,6 +1,32 @@
 # SPDX-License-Identifier: MIT
 # Copyright (C) 2022 Max Bachmann
 
+class MatchingBlock:
+    def __init__(self, a, b, size):
+        self.a = a
+        self.b = b
+        self.size = size
+
+    def __len__(self):
+        return 3
+
+    def __eq__(self, other):
+        if len(other) != 3:
+            return False
+
+        return (other[0] == self.a
+            and other[1] == self.b
+            and other[2] == self.size)
+
+    def __getitem__(self, i):
+        if i==0 or i==-3: return self.a
+        if i==1 or i==-2: return self.b
+        if i==2 or i==-1: return self.size
+
+        raise IndexError('MatchingBlock index out of range')
+
+    def __repr__(self):
+        return f"MatchingBlock(a={self.a}, b={self.b}, size={self.size})"
 
 class Editop:
     """

tests/test_cpp_fallback.py

@@ -0,0 +1,4 @@
+# simple test to ensure the C++ version is not missing any symbols
+import os
+os.environ["RAPIDFUZZ_IMPLEMENTATION"] = "cpp"
+import rapidfuzz

tests/test_pure_python_fallback.py

@@ -0,0 +1,4 @@
+# simple test to ensure the pure Python version is not missing any symbols
+import os
+os.environ["RAPIDFUZZ_IMPLEMENTATION"] = "python"
+import rapidfuzz