:mod:`arche.tools.helpers`
==========================

.. py:module:: arche.tools.helpers


Module Contents
---------------

.. py:class:: CollectionKey(project_key, store_key)

   .. method:: __str__(self)




.. function:: is_collection_key(value: str) -> bool

   <project id>/collections/s/<name>


.. function:: parse_collection_key(value)


.. function:: is_job_key(value)


.. function:: ms_to_time(ms: int) -> Optional[str]

   Convert ms to human time, stripping ms.

   >>> ms_to_time(12345678901)
   142 days, 21:21:18


.. function:: ratio_diff(source, target)

   Return a difference in ratio between two values


.. function:: to_float_or_zero(value)


.. function:: is_number(s)


.. function:: cpus_count() -> Optional[int]