Trying to get this to work, but keep on getting "ValueError: could not convert string to float:" error. I've tried read() and readline() but can't figure it out.

Thanks for the help!

```
from urllib2 import urlopen
current_time = urlopen("http://just-the-time.appspot.com/?f=%t")
print current_time.readline()

future = float(current_time.readline()) + 30
print "future" + future

```