title: How are Pipfile and Pipfile.lock used?
body: <p>It seems that <code>Pipfile</code> / <code>Pipfile.lock</code> are intended to be replacements for <code>requirements.txt</code>, in the context of Python packaging. There isn't much documentation out there on how these actually work, however. I found an evolving description of pipfile on the PyPi section of the Python website <a href="https://pypi.python.org/pypi/pipfile/0.0.2" rel="noreferrer">here</a> but it's pretty messy and doesn't explain the semantics of the different sections of the file.</p>
  <p>Any pointers on how to understand these files?</p>