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: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:: implementation
Object with information about the current Python implementation. For
MicroPython, it has following attributes:
* `name` - string "micropython"
* `version` - tuple (major, minor, micro), e.g. (1, 7, 0)
This object is the recommended way to distinguish MicroPython from other
Python implementations (note that it still may not exist in the very
minimal ports).
.. admonition:: Difference to CPython
:class: attention
CPython mandates more attributes for this object, but the actual useful
bare minimum is implemented in MicroPython.
.. 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.
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