'Add a path collection to data list as a scatter plot.
Current implementation defaults such collections as scatter plots.
Matplotlib supports collections that have many of the same parameters
in common like color, size, path, etc. However, they needn\'t all be
the same. Plotly does not currently support such functionality and
therefore, the style for the first object is taken and used to define
the remaining paths in the collection.
props.keys() -- [
\'paths\',                (structure: [vertices, path_code])
\'path_coordinates\',     (\'data\', \'axes\', \'figure\', or \'display\')
\'path_transforms\',      (mpl transform, including Affine2D matrix)
\'offsets\',              (offset from axes, helpful if in \'data\')
\'offset_coordinates\',   (\'data\', \'axes\', \'figure\', or \'display\')
\'offset_order\',
\'styles\',               (style dict, see below)
\'mplobj\'                (the collection obj being drawn)
props[\'styles\'].keys() -- [
\'linewidth\',            (one or more linewidths)
\'facecolor\',            (one or more facecolors for path)
\'edgecolor\',            (one or more edgecolors for path)
\'alpha\',                (one or more opacites for path)
\'zorder\',               (precedence when stacked)'

def draw_path_collection(self, **props):

    self.msg += '                Attempting    to    draw    a    path    collection\n'
    if (props['offset_coordinates'] is 'data'):
        markerstyle = mpltools.get_markerstyle_from_collection(props)
        scatter_props = {'coordinates': 'data', 'data': props['offsets'], 'label': None, 'markerstyle': markerstyle, 'linestyle': None}
        self.msg += '                Drawing    path    collection    as    markers\n'
        self.draw_marked_line(**scatter_props)
    else:
        self.msg += "                Path    collection    not    linked    to    'data',    not    drawing\n"
        warnings.warn("Dang!    That    path    collection    is    out    of    this    world.    I    totally    don't    know    what    to    do    with    it    yet!    Plotly    can    only    import    path    collections    linked    to    'data'    coordinates")
