:mod:`sys` -- system specific functions
=======================================

.. module:: sys
   :synopsis: system specific functions

Functions
---------

.. function:: exit(retval=0)

   Terminate current program with a given exit code. Underlyingly, this
   function raise as ``SystemExit`` exception. If an argument is given, its
   value given as an argument to ``SystemExit``.

.. function:: print_exception(exc, file=sys.stdout)

   Print exception with a traceback to a file-like object `file` (or
   ``sys.stdout`` by default).

   .. admonition:: Difference to CPython
      :class: attention

      This function appears in the ``traceback`` module in CPython.

Constants
---------

.. data:: argv

   A mutable list of arguments the current program was started with.

.. data:: byteorder

   The byte order of the system ("little" or "big").

.. data:: modules

   Dictionary of loaded modules. On some ports, it may not include builtin
   modules.

.. data:: path

   A mutable list of directories to search for imported modules.

.. data:: platform

   The platform that MicroPython is running on.  This is "pyboard" on the
   pyboard and provides a robust way of determining if a script is running
   on the pyboard or not.

.. data:: stderr

   Standard error stream.

.. data:: stdin

   Standard input stream.

.. data:: stdout

   Standard output stream.

.. data:: version

   Python language version that this implementation conforms to, as a string.

.. data:: version_info

   Python language version that this implementation conforms to, as a tuple of ints.