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e.g.,
...
try:
content = None
content = urllib.urlopen(_url).info()['Content-Type']
print "*"*10, content, _url, urllib.urlopen(_url).info()

stext = 'text/plain'

if content[0:len(stext)] == stext :
urllib.urlretrieve(_url, _dest)

except IOError:
return 0

...

urllib.urlopen(_url).info()ÊÇÖ»ÁÙʱÌá½»Ò»¸öheadÇëÇó, °ÑÒ³ÃæÍ·²¿downÏÂÀ´Ã´??

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{
public:
int val;
}

class B
{
public:
A a
}

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b.a.val = 1
ÎÒÔÚpythonÖÐÏëʹÓÃ
b.a = 1
......

python ÕýÔòÆ¥ÅäÖÐÎÄ

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