Well, you can do:
>>> exec(urllib2.urlopen('http://www.ics.uci.edu/~eppstein/PADS/UnionFind.py').read())
>>> uf = UnionFind()
Though, if you were really doing this, it would certainly make more sense to either wget
or curl
it to your local machine and then just import the module normally.
$ wget http://www.ics.uci.edu/~eppstein/PADS/UnionFind.py
>>> from UnionFind import UnoinFind
>>> uf = UnionFind()
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…