title: python subprocess call not working with "echo" linux command
body: <p>to simplify the problem, I want to use subprocess.call to write a simple string such as "abc" into a dummy file called  "test"</p>
  
  <pre><code>subprocess.call(["echo", "abc", "&gt;", "/data/test"])
  </code></pre>
  
  <p>the result is not as expected: it outputs on the console </p>
  
  <blockquote>
    <p>abc > /data/test</p>
  </blockquote>