Add Subtract operator and write logs in other thread.

QP.py

 import json
+import threading
+
+
+def subtract(a, b):
+    return [*(item for item in a if item not in b)]
 
 
 def union_two(a, b):
@@ -39,7 +44,6 @@ def normalize_list(lst):
 
 def union(inp):
     n = len(inp)
-    vl = None
     vl = normalize_list(inp)
     while n >= 2:
         if n == 2:
@@ -93,12 +97,13 @@ def get_info(inp):
 
 def write_logs(string):
     file = open(f"./logs/log.txt", "a", encoding="utf-8")
-    file.write(string)
+    file.write(string + "\n")
     file.close()
 
 
 def enter(it):
-    write_logs(it)
+    t1 = threading.Thread(target=write_logs, args=(it,))
+    t1.start()
     spl = list(it.split(" "))
     file = open("./index/ii.json", "r", encoding="utf-8")
     index = json.load(file)
@@ -111,22 +116,32 @@ def enter(it):
     ld = dict()
     for i in range(len(rs)):
         ld[rs[i]] = index.get(rs[i])
+        print(ld[rs[i]])
 
+    ld_copy = ld.copy()
     opt = list()
     if len(rs) > 1:
         flag = operations(spl)
         while len(flag) > 0:
             if "&" in flag:
                 _and = spl.index("AND")
-                opt.append(intersect(ld[spl[_and + 1]], ld[spl[_and - 1]]))
+                nxt_word = spl[_and + 1]
+                prv_word = spl[_and - 1]
+                opt.extend(intersect(ld[nxt_word], ld[prv_word]))
                 spl.pop(_and)
+                ld.pop(nxt_word)
+                ld.pop(prv_word)
+                ld["opt"] = opt
                 flag = operations(spl)
             elif "!" in flag:
                 _not = spl.index("NOT")
+                nxt_word = spl[_not + 1]
+                prv_word = spl[_not - 1]
+                opt = subtract(ld[prv_word], ld[nxt_word])
+                print(opt)
                 spl.pop(_not)
                 flag = operations(spl)
-                pass
-
 
     out_data = get_info(ld)
+    t1.join()
     return out_data