python函数中声明全局变量_在python中声明函数中的全局变量

我创建的程序将用于解析xml文件并将解析数据放入数据库。虽然我的代码现在可以运行了，但我的导师在我的代码中有一个注释，顺便说一句，这是我的代码：import os

import time

import MySQLdb

import ConfigParser

import elementtree.ElementTree as ET

def update_database(article_code, date_received, s100rsd, remark_text, db):

cur = db.cursor()

try:

cur_query = cur.execute("""INSERT INTO tblS100CurrentListing """

"""(article_Code, dateReceived, s100RSD, remarks) VALUES (%s, %s, %s, %s) """

"""ON DUPLICATE KEY UPDATE revisedRSD = %s, remarks = %s """,

(article_code, date_received, s100rsd, remark_text, s100rsd, remark_text))

db.commit()

except MySQLdb.Error, e:

print "An error has been passed %s" %e

db.rollback

rows_affected = cur.rowcount

if rows_affected > 0:

print "Changes made in the database"

else:

print "Nothing is change in the database"

def parse_xml(source_path, xml_file):

# Alvin: !!! globals?

global article_code

global date_received

global s100rsd

global remark_text

article_code = xml_file.split('.')[0]

tree = ET.parse(xml_file)

root = tree.getroot()

order = root.find('order')

order_time = order.find('time')

year = order_time.attrib['yr']

month = order_time.attrib['month']

day = order_time.attrib['day']

hour = order_time.attrib['hr']

min = order_time.attrib['min']

sec = order_time.attrib['sec']

date_received = year + month + day + hour + min + sec

due_date = order.find('due-date')

due_date_time = due_date.find('time')

yr = due_date_time.attrib['yr']

month = due_date_time.attrib['month']

day = due_date_time.attrib['day']

s100rsd = "%s-%s-%s" %(yr, month, day)

item_info = order.find('item-info')

item_remarks = item_info.find('item-remarks')

item_remark_list = item_remarks.findall('item-remark')

item_remark_len = len(item_remark_list) - 1

item_remark = item_remark_list[item_remark_len]

remark = item_remark.find('remark')

remark_text = remark.text

def main():

config = ConfigParser.ConfigParser()

config.readfp(open('part4b.ini'))

server = config.get('main', 'Server')

port = config.get('main', 'Port')

port = int(port)

schema = config.get('main', 'Schema')

table = config.get('main', 'Table')

user = config.get('main', 'User')

password = config.get('main', 'Password')

source_path = config.get('main', 'filepath')

db = MySQLdb.connect(server, user, password, schema, port)

xml_list = os.listdir(source_path)

for xml_file in xml_list:

if xml_file.endswith('.xml'):

parse_xml(source_path, xml_file)

update_database(article_code, date_received, s100rsd, remark_text, db)

db.close()

print "This will close after 2 seconds . ."

time.sleep(2)

if __name__ == '__main__':

main()

在parse_xml函数中，他不希望我在其中使用全局变量。如何在main中使用这些变量而不声明为全局变量？在

谢谢你的帮助。在