build python version rag-flow (#21)

* clean rust version project

* clean rust version project

* build python version rag-flow

rag/nlp/synonym.py

@@ -0,0 +1,64 @@
+import json
+import os
+import time
+import logging
+import re
+
+from web_server.utils.file_utils import get_project_base_directory
+
+
+class Dealer:
+    def __init__(self, redis=None):
+
+        self.lookup_num = 100000000
+        self.load_tm = time.time() - 1000000
+        self.dictionary = None
+        path = os.path.join(get_project_base_directory(), "rag/res", "synonym.json")
+        try:
+            self.dictionary = json.load(open(path, 'r'))
+        except Exception as e:
+            logging.warn("Miss synonym.json")
+            self.dictionary = {}
+
+        if not redis:
+            logging.warning(
+                "Realtime synonym is disabled, since no redis connection.")
+        if not len(self.dictionary.keys()):
+            logging.warning(f"Fail to load synonym")
+
+        self.redis = redis
+        self.load()
+
+    def load(self):
+        if not self.redis:
+            return
+
+        if self.lookup_num < 100:
+            return
+        tm = time.time()
+        if tm - self.load_tm < 3600:
+            return
+
+        self.load_tm = time.time()
+        self.lookup_num = 0
+        d = self.redis.get("kevin_synonyms")
+        if not d:
+            return
+        try:
+            d = json.loads(d)
+            self.dictionary = d
+        except Exception as e:
+            logging.error("Fail to load synonym!" + str(e))
+
+    def lookup(self, tk):
+        self.lookup_num += 1
+        self.load()
+        res = self.dictionary.get(re.sub(r"[ \t]+", " ", tk.lower()), [])
+        if isinstance(res, str):
+            res = [res]
+        return res
+
+
+if __name__ == '__main__':
+    dl = Dealer()
+    print(dl.dictionary)