從文件中讀取配置

Question

我嘗試讀取配置文件並將值分配給變量：

#!/usr/bin/env python
# -*- coding: utf-8 -*-


with open('bot.conf', 'r') as bot_conf:
    config_bot = bot_conf.readlines()
bot_conf.close()

with open('tweets.conf', 'r') as tweets_conf:
    config_tweets = tweets_conf.readlines()
tweets_conf.close()

def configurebot():
    for line in config_bot:
        line = line.rstrip().split(':')
    if (line[0]=="HOST"):
        print "Working If Condition"
        print line
        server = line[1]


configurebot()
print server

它似乎做得很好，除了它沒有為服務器變量賦值

ck@hoygrail ~/GIT/pptweets2irc $ ./testbot.py 
Working If Condition
['HOST', 'irc.piratpartiet.se']
Traceback (most recent call last):
  File "./testbot.py", line 23, in <module>
    print server
NameError: name 'server' is not defined

Answer 1

您的sever變量是configurebot函數中的局部變量。

如果你想在函數之外使用它，你必須使它成為global 。

Answer 2

server符號未在您使用它的范圍中定義。

為了能夠打印它，您應該從configurebot()返回它。

#!/usr/bin/env python
# -*- coding: utf-8 -*-


with open('bot.conf', 'r') as bot_conf:
    config_bot = bot_conf.readlines()
bot_conf.close()

with open('tweets.conf', 'r') as tweets_conf:
    config_tweets = tweets_conf.readlines()
tweets_conf.close()

def configurebot():
    for line in config_bot:
        line = line.rstrip().split(':')
    if (line[0]=="HOST"):
        print "Working If Condition"
        print line
        return line[1]


print configurebot()

你也可以在調用configurebot（）之前聲明它，如下所示：

server = None
configurebot()
print server