does not greet nicks who leave quickly

bot.py

@@ -57,12 +57,10 @@ def makeNickArray():  # On startup, makes array of nicks from Nicks.txt.  New in
         for row in nicksData:
              nickArray.append(row)
     return nickArray
-    # Do I need to explicitly close this file?
 
 def addPerson(person):  # Adds newcomer to list of known nicks
     person = person.replace("_","")
     nickArray.append([person])
-    print nickArray
     with open('nicks.csv', 'a') as csvfile:
         nickwriter = csv.writer(csvfile, delimiter=',', quotechar='|', quoting=csv.QUOTE_MINIMAL)
         nickwriter.writerow([person])
@@ -114,6 +112,11 @@ while 1:  # Loop forever
                     if actor not in (i.nick for i in newList):
                         newList.append(newcomer(actor))
 
+        if ircmsg.find("PART " + channel) != -1 or ircmsg.find("QUIT") != -1:  # If someone parts or quits the #channel
+            for i in newList:  # And that person is on the newlist (has entered channel within last 60 seconds)
+                if actor == i.nick:
+                    newList.remove(i)   # Remove them from the list
+
         # Unwelcome functions
         if ircmsg.find(botnick) != -1 and ircmsg.find("PRIVMSG") != -1: # If someone talks to (or refers to) the bot
             chan = channel