Review Request of Python Code

[subhabangalore at gmail.com]

Dear Group,

I am trying to write a code for pulling data from MySQL at the backend and annotating words and trying to put the results as separated sentences with each line. The code is generally running fine but I am feeling it may be better in the end of giving out sentences, and for small data sets it is okay but with 50,000 news articles it is performing dead slow. I am using Python2.7.11 on Windows 7 with 8GB RAM. 

I am trying to copy the code here, for your kind review. 

import MySQLdb
import nltk
def sql_connect_NewTest1():
    db = MySQLdb.connect(host="localhost",
                     user="*****",         
                     passwd="*****",  
                     db="abcd_efgh")
    cur = db.cursor()
    #cur.execute("SELECT * FROM newsinput limit 0,50000;") #REPORTING RUNTIME ERROR
    cur.execute("SELECT * FROM newsinput limit 0,50;")
    dict_open=open("/python27/NewTotalTag.txt","r") #OPENING THE DICTIONARY FILE 
    dict_read=dict_open.read() 
    dict_word=dict_read.split()
    a4=dict_word #Assignment for code. 
    list1=[]
    flist1=[]
    nlist=[]
    for row in cur.fetchall():
        #print row[2]
        var1=row[3]
        #print var1 #Printing lines
        #var2=len(var1) # Length of file
        var3=var1.split(".") #SPLITTING INTO LINES
        #print var3 #Printing The Lines 
        #list1.append(var1)
        var4=len(var3) #Number of all lines
        #print "No",var4
        for line in var3:
            #print line
            #flist1.append(line)
            linew=line.split()
            for word in linew:
                if word in a4:
                    windex=a4.index(word)
                    windex1=windex+1
                    word1=a4[windex1]
                    word2=word+"/"+word1
                    nlist.append(word2)
                    #print list1
                    #print nlist
                elif word not in a4:
                    word3=word+"/"+"NA"
                    nlist.append(word3)
                    #print list1
                    #print nlist
                else:
                    print "None"
            
    #print "###",flist1
    #print len(flist1)
    #db.close()
    #print nlist
    lol = lambda lst, sz: [lst[i:i+sz] for i in range(0, len(lst), sz)] #TRYING TO SPLIT THE RESULTS AS SENTENCES 
    nlist1=lol(nlist,7)
    #print nlist1
    for i in nlist1:
        string1=" ".join(i)
        print i
        #print string1
    
   
Thanks in Advance.