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    pyudev._util
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    Internal utilities

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    Return a byte string, which represents the given ``value`` in a way
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    Iteration helper for udev list entry objects.

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    Get the device type of a device file.

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    Get the version of the underlying udev library.

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    labels releases with a single consecutive number.  Consequently, the
    version number returned by this function is a single integer, and not a
    tuple (like for instance the interpreter version in
    :data:`sys.version_info`).

    As libudev itself does not provide a function to query the version number,
    this function calls the ``udevadm`` utility, so be prepared to catch
    :exc:`~exceptions.EnvironmentError` and
    :exc:`~subprocess.CalledProcessError` if you call this function.

    Return the version number as single integer.  Raise
    :exc:`~exceptions.ValueError`, if the version number retrieved from udev
    could not be converted to an integer.  Raise
    :exc:`~exceptions.EnvironmentError`, if ``udevadm`` was not found, or could
    not be executed.  Raise :exc:`subprocess.CalledProcessError`, if
    ``udevadm`` returned a non-zero exit code.  On Python 2.7 or newer, the
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