擅长:python、mysql、java
<p>你试过使用<code>subprocess.call</code>吗?在</p>
<p><a href="https://docs.python.org/2/library/subprocess.html#subprocess.call" rel="nofollow">Python 2</a>-<a href="https://docs.python.org/3/library/subprocess.html#subprocess.call" rel="nofollow">Python 3</a></p>
<blockquote>
<p>Run the command described by args. Wait for command to complete, then return the returncode attribute.</p>
</blockquote>
<p>似乎是你想做的。只需运行第一个进程,检查文件是否存在,然后将文件传递给第二个进程使用。在</p>
<p><code>subprocess.check_call</code>也适用于您正在尝试的操作,只是如果进程返回非零返回代码,它将引发异常,<code>call</code>将简单地返回返回代码。在</p>