title: Databricks: CryptographyDeprecationWarning: Python 3.5 support will be dropped in the next release of cryptography
body: <p>I'm using Databricks cluster 5.5 LTS version. And initially, I was using it with Python 2. But now I've upgraded from Python 2 to 3 keeping the cluster version the same. I've installed the library PGPy to perform the decryption of PGP files in python. However, due to this upgrade a scala notebook (which was running perfectly fine before this upgrade) is failing with the following error:</p>
  <pre><code>org.apache.spark.SparkException: Job aborted due to stage failure: Task 0 in stage 1.0 failed 4 times, most recent failure: Lost task 0.3 in stage 1.0 (TID 7, 10.139.64.4, executor 2): org.apache.spark.SparkException: Process List(/databricks/python/bin/pip, install, xlrd, --disable-pip-version-check) exited with code 1. /databricks/python3/lib/python3.5/site-packages/OpenSSL/_util.py:6: CryptographyDeprecationWarning: Python 3.5 support will be dropped in the next release of cryptography. Please upgrade your Python.
  </code></pre>
  <p>How can I resolve this error?</p>