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zGet a list of containers present on the system.
:param get_all: If set, include stopped containers as well
:type get_all: ``bool``
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zGet a list of images present on the system
:returns: A list of 2-tuples containing (image_name, image_id)
:rtype: ``list``
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:param container: The name or ID of the container in which to run
:type container: ``str``
:param cmd: The command to run inside `container`
:type cmd: ``str``
:param quotecmd: Whether the cmd should be quoted.
:type quotecmd: ``bool``
:returns: Formatted string to run `cmd` inside `container`
:rtype: ``str``
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