python - How to find out whether computer is connected to internet?

Question

How to find out whether computer is connected to internet in python?

Answer 1

如果你有python2.6，你可以设置一个超时。否则连接可能会阻塞很长时间。

try:
    urllib2.urlopen("http://example.com", timeout=2)
except urllib2.URLError:
    # There is no connection

Answer 2

尝试

import urllib
file = urllib.urlopen("http://stackoverflow.com/")
html = file.read()

看看它是否有效，或者它是否引发异常。即使您不使用确切的代码，您也应该明白这一点。