title: Install confluent-kafka avro with pip
body: <p>I'm trying to install the avro package for confluent-kafka with python3 on macOs Sierra. </p>
  
  <p>Installing the confluent-kafka package works fine, no issues. The problem is when I try to install the avro package: </p>
  
  <pre><code>pip install confluent-kafka[avro]
  </code></pre>
  
  <p>I just get an error message from the bash, saying: </p>
  
  <pre><code>no matches found: confluent-kafka[avro]
  </code></pre>
  
  <p>How can I install this package? Anyone else that have managed to do it on mac? </p>