How Do I Add Transparency To Shape In Python Pptx?

def new_presentation(): prs=Presentation() img='C:/Users/Dennis/Desktop/Tom-Hiddleston-4-1024x768.jpg' mainsld=new_slide(prs, 6) mainshp=mainsld.shapes mainshp.

Solution 1:

After much digging, I have been able to come up with a solution for this

from pptx import Presentation
from pptx.oxml.xmlchemy import OxmlElement
from pptx.util import Cm
from pptx.enum.shapes import MSO_SHAPE
from pptx.dml.color import RGBColor

defSubElement(parent, tagname, **kwargs):
        element = OxmlElement(tagname)
        element.attrib.update(kwargs)
        parent.append(element)
        return element

def_set_shape_transparency(shape, alpha):
    """ Set the transparency (alpha) of a shape"""
    ts = shape.fill._xPr.solidFill
    sF = ts.get_or_change_to_srgbClr()
    sE = SubElement(sF, 'a:alpha', val=str(alpha))

## Create presentation
prs = Presentation()
## Add a slide (empty slide layout)
slide = prs.slides.add_slide(prs.slide_layouts[6])
##Add a blue box to the slide
blueBox = slide.shapes.add_shape(autoshape_type_id=MSO_SHAPE.RECTANGLE,
                         left=Cm(0),
                         top=Cm(0),
                         height=Cm(10),
                         width=Cm(20))
## Make the box blue
blueBoxFill = blueBox.fill
blueBoxFill.solid()
blueBoxFillColour = blueBoxFill.fore_color
blueBoxFillColour.rgb = RGBColor(0,176,240)
## Set the transparency of the blue box to 56%
_set_shape_transparency(blueBox,44000)
## Save the presentation
prs.save(your_path)

Solution 2:

FillFormat.transparency is not implemented yet. The part of the documentation where you saw that may have been an analysis page, which is a precursor to development.

This is the analysis page: http://python-pptx.readthedocs.io/en/latest/dev/analysis/features/dml-fill.html?highlight=transparency

This is the FillFormat (.fill) API, as developed: http://python-pptx.readthedocs.io/en/latest/api/dml.html#fillformat-objects

You can however use lxml calls from the FillFormat object to manipulate the XML under it. You probably want to start with the spPr element in the .fill element:

spPr = titleshape.fill._xPr
print spPr.xml

Here's one example of doing that sort of thing: https://groups.google.com/forum/#!msg/python-pptx/UTkdemIZICw/qeUJEyKEAQAJ

You'll find more if you search on various combinations of the terms python-pptx, OxmlElement, lxml, and workaround function.