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$_ = "http://baidu.com/1441330475/yzPJvn4v3 http://baidu.com/1441330475/yzPJvn4v9 http://baidu.com/1441330475/yzPJvn4v1 http://baidu.com/1441330475/yzPJvn4v4 http://baidu.com/1441330475/yzPJvn4v2 http://baidu.com/1441330475/yzPJvn4v6";
@res = m|/(\w+)\s+|g;
print join(", ", @res), "\n";
>>> res = r'/([a-zA-z0-9]*?) '
>>> m = re.findall(res,s)
>>> m
['yzPJvn4v3', 'yzPJvn4v9', 'yzPJvn4v1', 'yzPJvn4v4', 'yzPJvn4v2']
>>>