Stop regexp processing after timeput (60sec)

Minor pep8 fixes

bin/RegexForTermsFrequency.py

@@ -9,20 +9,29 @@ supplied in  the term webpage.
 import redis
 import time
 from pubsublogger import publisher
-from packages import lib_words
 from packages import Paste
-import os
-from os import environ
-import datetime
 import calendar
 import re
+import signal
+import time
 from Helper import Process
-
 # Email notifications
 from NotificationHelper import *
 
+
+class TimeoutException(Exception):
+    pass
+
+
+def timeout_handler(signum, frame):
+    raise TimeoutException
+
+signal.signal(signal.SIGALRM, timeout_handler)
+
+
 # Config Variables
 DICO_REFRESH_TIME = 60  # s
+PROCESS_TIMEOUT = 60
 
 BlackListTermsSet_Name = "BlackListSetTermSet"
 TrackedTermsSet_Name = "TrackedSetTermSet"
@@ -38,6 +47,7 @@ top_termFreq_set_array = [top_termFreq_setName_day,top_termFreq_setName_week, to
 # create direct link in mail
 full_paste_url = "/showsavedpaste/?paste="
 
+
 def refresh_dicos():
     dico_regex = {}
     dico_regexname_to_redis = {}
@@ -91,7 +101,17 @@ if __name__ == "__main__":
 
             # iterate the word with the regex
             for regex_str, compiled_regex in dico_regex.items():
+
+                signal.alarm(PROCESS_TIMEOUT)
+                try:
                     matched = compiled_regex.search(content)
+                except TimeoutException:
+                    log_msg = "{0} processing timeout".format(filename)
+                    print (log_msg)
+                    publisher.critical(log_msg)
+                    continue
+                else:
+                    signal.alarm(0)
 
                 if matched is not None:  # there is a match
                     print('regex matched {}'.format(regex_str))