python2中的子进程返回错误

Question

我试图在Ubuntu上输入文本到ots summerizer。我正在使用python2 subprocess库。但一直得到以下错误：

text = "the shards that cut me the deepest were the ones that intended to cut , obama to melania trump as first lady 's largest public appearance since the 2016 election - speaking in front of more than 8,000 people at the women 's foundation of colorado 's 30th anniversary celebration - and she touched on personal attacks that she faced again and again" 
>>> sum = subprocess.check_output('ots --ratio=30 <' + text) 
Traceback (most recent call last): 
    File "<stdin>", line 1, in <module> 
    File "/usr/lib/python2.7/subprocess.py", line 567, in check_output 
    process = Popen(stdout=PIPE, *popenargs, **kwargs) 
    File "/usr/lib/python2.7/subprocess.py", line 711, in __init__ 
    errread, errwrite) 
    File "/usr/lib/python2.7/subprocess.py", line 1343, in _execute_child 
    raise child_exception 
OSError: [Errno 36] File name too long 

即使我已经阅读了ots需要从文件或stdin输入。因此，我试图把输入为：

sum = subprocess.check_output(['echo',text,'> stdin']) 

但得到以下的输出：

"the shards that cut me the deepest were the ones that intended to cut , obama to melania trump as first lady 's largest public appearance since the 2016 election - speaking in front of more than 8,000 people at the women 's foundation of colorado 's 30th anniversary celebration - and she touched on personal attacks that she faced again and again > stdin\n" 

但它不是我想要的目的。我只是想使用python的subprocess将文本输入到ots库。这是否是一种方法，并从ots快速获得摘要？请帮助我。

Answer 1

我相信你需要|管道运营商。

sum = subprocess.check_output('echo {} | ots --ratio=30'.format(text), shell=True) 

bash中的<符号用于从另一个流中获取输入。