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.. _stdin:
Input via STDIN
===============
STDIN is sent to a process directly by using a command's :ref:`in` special
kwarg:
.. code-block:: python
print(cat(_in="test"))
Any command that takes input from STDIN can be used this way:
.. code-block:: python
print(tr("[:lower:]", "[:upper:]", _in="sh is awesome"))
You're also not limited to using just strings. You may use a file object, a
:class:`queue.Queue`, or any iterable (list, set, dictionary, etc):
.. code-block:: python
stdin = ["sh", "is", "awesome"]
out = tr("[:lower:]", "[:upper:]", _in=stdin)
.. note::
If you use a queue, you can signal the end of the queue (EOF) with ``None``
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