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<p class="MsoNormal">Hi folks,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’m trying to do a simple script to open an existing project, add a layer and then save the result but finding it hard to piece together the information I can find online.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’ve found various posts suggesting that you need to connect up the canvas or all the GUI information gets lost when you do a project.write() command but for some reason I can only find answers that contain snippets which usually seem to
reference iface or canvas without showing how to initiate those in a standalone way.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Particularly, if you look at <a href="https://docs.qgis.org/3.16/en/docs/pyqgis_developer_cookbook/loadproject.html">
https://docs.qgis.org/3.16/en/docs/pyqgis_developer_cookbook/loadproject.html</a> you have a note about needing to set a bridge but that references canvas which if you copy/paste as per the details in that section alone will of course result in a ‘canvas undefined’
error. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Is there a simple full example anywhere that shows how you can open a project file using a standalone python script, add one layer and save it without losing half the information in the project file?
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">My best effort so far added the layer but resulted in existing layers being invalid when I opened the project in QGIS and my “improved” version…at the moment…seems to be almost halving the size of the project so I assume it is still deleting
all the canvas information. Any hints would be appreciated <span style="font-family:"Segoe UI Emoji",sans-serif">
😊</span><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks<o:p></o:p></p>
<p class="MsoNormal">Paul <o:p></o:p></p>
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