title: I can't import pyarrow
body: <p>when I am trying to import pyarrow in python, I get the following error:</p>
  
  <pre><code>File "&lt;stdin&gt;", line 1, in &lt;module&gt;
  File "/services/matejm/anaconda3/lib/python3.7/site-packages/pyarrow/_init_.py", line 49, in &lt;module&gt;
  from pyarrow.lib import cpu_count, set_cpu_count
  ImportError: libaws-cpp-sdk-s3.so: cannot open shared object file: No such file or directory
  </code></pre>
  
  <p>What can this be related to? I have searched wherever i could've and could not find any reason for it, so I figured i might as well try in here.</p>
  
  <p>Thank you very much</p>
  
  <p>Note: I have installed py-arrow and its dependencies off-line, since our cluster has a company firewall that does not allow pip installation</p>