diff --git a/omero_search_engine/api/stats/urls.py b/omero_search_engine/api/stats/urls.py
index bfb2bd41..beb28637 100644
--- a/omero_search_engine/api/stats/urls.py
+++ b/omero_search_engine/api/stats/urls.py
@@ -18,10 +18,9 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from . import stats
-from flask import request, jsonify, make_response
-import json
 from tools.utils.logs_analyser import get_search_terms
-from flask import jsonify, Response
+from flask import Response
+
 
 @stats.route("/", methods=["GET"])
 def index():
@@ -31,15 +30,15 @@ def index():
 @stats.route("/<resource>/search_terms", methods=["GET"])
 def search_terms(resource):
     from omero_search_engine import search_omero_app
-    logs_folder=search_omero_app.config.get("SEARCHENGINE_LOGS_FOLDER")
-    content=get_search_terms(logs_folder,resource=resource,return_file_content=True)
+
+    logs_folder = search_omero_app.config.get("SEARCHENGINE_LOGS_FOLDER")
+    content = get_search_terms(logs_folder, resource=resource, return_file_content=True)
 
     return Response(
         content,
         mimetype="text/csv",
         headers={
-            "Content-disposition": "attachment; filename=%s_stats.csv"
-                                   % (resource)
+            "Content-disposition": "attachment; filename=%s_stats.csv" % (resource)
         },
     )
 
diff --git a/tools/utils/logs_analyser.py b/tools/utils/logs_analyser.py
index 088f0d9e..f9c43b10 100644
--- a/tools/utils/logs_analyser.py
+++ b/tools/utils/logs_analyser.py
@@ -2,65 +2,75 @@
 import os
 import sys
 import logging
+
 logging.basicConfig(stream=sys.stdout, level=logging.INFO)
 
-'''
+"""
 this script read the log file and get the search terms
 it analyses the file and produces reports
- e.g. csv files contain the search terms 
-'''
+ e.g. csv files contain the search terms
+"""
+
 
-def get_search_terms(folder_name,resource=None, return_file_content=False):
-    logging.info("checking files inisde: %s"%folder_name)
+def get_search_terms(folder_name, resource=None, return_file_content=False):
+    logging.info("checking files inisde: %s" % folder_name)
     resourses = {}
     for root, dirs, files in os.walk(folder_name):
-        logging.info("0....%s,%s,%s"%(root,dirs, files))
+        logging.info("0....%s,%s,%s" % (root, dirs, files))
         for file_name in files:
-            logging.info("1..... checking %s"% file_name)
-            if file_name.endswith('engine_gunilog.log'):
-                file_name=os.path.join(root,file_name)
+            logging.info("1..... checking %s" % file_name)
+            if file_name.endswith("engine_gunilog.log"):
+                file_name = os.path.join(root, file_name)
                 logging.info("2..... checking %s" % file_name)
-                analyse_log_file(file_name,resourses)
+                analyse_log_file(file_name, resourses)
     logging.info("Write the reports")
-    contents=write_reports(resourses,resource, return_file_content,os.path.join(folder_name,"report.csv"))
+    contents = write_reports(
+        resourses,
+        resource,
+        return_file_content,
+        os.path.join(folder_name, "report.csv"),
+    )
     if return_file_content:
         return contents
 
-def analyse_log_file(file_name,resourses):
-    #file_name="/mnt/d/logs/engine_gunilog.log"
-    logging.info ("Analyse: %s"%file_name)
+
+def analyse_log_file(file_name, resourses):
+    # file_name="/mnt/d/logs/engine_gunilog.log"
+    logging.info("Analyse: %s" % file_name)
     f = open(file_name, "r")
-    contents=f.read()
-    logs=contents.split("INFO in query_handler: -------------------------------------------------")
+    contents = f.read()
+    logs = contents.split(
+        "INFO in query_handler: -------------------------------------------------"
+    )
     f.close()
 
-    failes=0
-    suc=0
-    co=0
-    filters=[]
-    for i in range (0, len(logs),2):
-        cont=logs[i].split(("\n"))
-        lo=cont[1].split("in query_handler:")
-        ss="{'and_filters':"+ lo[-1].split("{'and_filters':")[-1]
+    failes = 0
+    suc = 0
+    co = 0
+    filters = []
+    for i in range(0, len(logs), 2):
+        cont = logs[i].split(("\n"))
+        lo = cont[1].split("in query_handler:")
+        ss = "{'and_filters':" + lo[-1].split("{'and_filters':")[-1]
         if "[20]" in ss:
             continue
-        co+=1
-        ss=ss.replace("'", '"').replace('False', 'false').replace('None','"None"')
+        co += 1
+        ss = ss.replace("'", '"').replace("False", "false").replace("None", '"None"')
         try:
-           filters.append(json.loads(ss,strict=False))
-           suc=suc+1
-        except:
-            failes=failes+1
-
+            filters.append(json.loads(ss, strict=False))
+            suc = suc + 1
+        except Exception as e:
+            print(str(e))
+            failes = failes + 1
 
     for filter in filters:
         check_filters(filter.get("and_filters"), resourses)
         for or_f in filter.get("or_filters"):
             check_filters(or_f, resourses)
 
-def check_filters(conds,resourses):
-    for cond in conds:
 
+def check_filters(conds, resourses):
+    for cond in conds:
         if cond.get("resource") in resourses:
             names_values = resourses[cond.get("resource")]
         else:
@@ -73,26 +83,27 @@ def check_filters(conds,resourses):
         else:
             names_values[name] = [value]
 
-def write_reports(resourses, resource, return_file_content,file_name):
+
+def write_reports(resourses, resource, return_file_content, file_name):
     for res, itms in resourses.items():
         lines = ["key,total hits,unique hits"]
-        for name,values in itms.items():
-            line=[name]
-            vv=[]
+        for name, values in itms.items():
+            line = [name]
+            vv = []
             for val in values:
                 if val not in vv:
                     vv.append(val)
-            line.insert(1,str(len(values)))
+            line.insert(1, str(len(values)))
             line.insert(2, str(len(vv)))
-            lines.append(','.join(line))
-        contents="\n".join(lines)
+            lines.append(",".join(line))
+        contents = "\n".join(lines)
         if return_file_content:
-            if res==resource:
-                print ("================================")
-                print (resource, return_file_content)
-                print ("================================")
+            if res == resource:
+                print("================================")
+                print(resource, return_file_content)
+                print("================================")
                 return contents
         else:
-            f = open(file_name.replace(".csv","_%s.csv"%res), "w")
+            f = open(file_name.replace(".csv", "_%s.csv" % res), "w")
             f.write(contents)
             f.close()
diff --git a/tools/utils/util.py b/tools/utils/util.py
index 3727f5ae..37937470 100644
--- a/tools/utils/util.py
+++ b/tools/utils/util.py
@@ -34,7 +34,9 @@ def copy_tools_subfolder():
     destination_folder = "/etc/searchengine/"
     if not os.path.isdir(destination_folder):
         destination_folder = os.path.expanduser("~")
-    destination_folder = os.path.join(destination_folder, "searchengine/maintenance_scripts")
+    destination_folder = os.path.join(
+        destination_folder, "searchengine/maintenance_scripts"
+    )
 
     if not os.path.isdir(destination_folder):
         shutil.copytree(subfolder, destination_folder)