#######
Example
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Here are some examples of how to use pifacecommon.

MCP23S17
========

::

    >>> import pifacecommon.mcp23s17
    >>> mcp = pifacecommon.mcp23s17.MCP23S17()
    >>> mcp.gpioa.value = 0xAA
    >>> mcp.gpioa.value
    170
    >>> mcp.gpioa.bits[3].value
    1