Python-сообщество

# -*- coding: utf8 -*-
import MySQLdb
import urllib2
import urlparse
from xml.dom.minidom import parse
def my_get():
    url = open('D:\excel ver 3.xml')
    xml = parse(url)
    name = xml.getElementsByTagName('Workbook')
    for node in name:
	    el = node.getElementsByTagName('Cell')
	    title = []
	    sql_ = []
	    i = 0
	    j = 0
	    z = 0
	    zm = 0
	    while i < len(el):
		    if (el[i].hasAttribute('ss:StyleID')) and (el[i].attributes['ss:StyleID'].value == "s274"):
			    title.append(el[i].getElementsByTagName('Data')[0].firstChild.nodeValue)
			    print title[j]
			    j += 1
		    i += 1
    print i
    print j
    print repr(title).decode("unicode_escape")
    con = MySQLdb.connect(host="localhost", user="root", passwd="vertrigo", db="moodle", use_unicode=True, charset='utf8')
    cur = con.cursor()
    while z < j:
	    zm = z+1
	    sql_[z]="UPDATE mdl_course_sections SET name='"+title[z]+"' WHERE (course='12' AND section='1');"
	    try:
		    cur.execute(sql_[z])
	    except MySQLdb.DatabaseError, err:
		    print u"Ошибка:", err
	    else:
		    print u"Запрос успешно выполнен"
	    con.commit()
	    z += 1
    cur.close()
    con.close()

>>> L = []
>>> L[0] = 1
Traceback (most recent call last):
  File "<console>", line 1, in ?
IndexError: list assignment index out of range
>>>