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.. autofunction:: rgb
.. autofunction:: iterflatlist
.. autofunction:: strlist
.. autofunction:: get_unit
.. autofunction:: split_coordinate
.. autofunction:: split_angle
.. autofunction:: rect_top_left_corner
.. autofunction:: pretty_xml
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Convert **r**, **g**, **b** values to a `string`.
:param r: red part
:param g: green part
:param b: blue part
:param string mode: ``'RGB | %'``
:rtype: string
========= =============================================================
mode Description
========= =============================================================
``'RGB'`` returns a rgb-string format: ``'rgb(r, g, b)'``
``'%'`` returns percent-values as rgb-string format: ``'rgb(r%, g%, b%)'``
========= =============================================================
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Split coordinate into `<number>` and 'unit` identifier.
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Calculate top-left corner of a rectangle.
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:param 2-tuple insert: insert point
:param 2-tuple size: (width, height)
:param string pos: insert position ``'vert-horiz'``
:return: ``'top-left'`` corner of the rect
:rtype: 2-tuple
========== ==============================
pos valid values
========== ==============================
**vert** ``'top | middle | bottom'``
**horiz** ``'left'|'center'|'right'``
========== ==============================
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