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<p class="MsoNormal"><span style="font-size:11.5pt;font-family:"Arial",sans-serif;color:#242729;background:#F9F8F6">Here is my problem: I have 3 layers only I would like to remove all the attributes that are not on layer 1, no table of layers will provide a
 foreign key or link. So delete the layer 2 and 3 attributes that are not on layer 1.<o:p></o:p></span></p>
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<p class="MsoNormal">Screen : <a href="https://i.stack.imgur.com/nnOxd.png">https://i.stack.imgur.com/nnOxd.png</a><o:p></o:p></p>
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<p class="MsoNormal"><a href="https://gis.stackexchange.com/questions/374754/delete-unnecessary-pyqgis-attributes?noredirect=1#comment612308_374754">https://gis.stackexchange.com/questions/374754/delete-unnecessary-pyqgis-attributes?noredirect=1#comment612308_374754</a><o:p></o:p></p>
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<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Arial",sans-serif;color:#4E87A0;mso-fareast-language:FR">Mathias Mirra<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#4E87A0;mso-fareast-language:FR">Développeur</span><span style="font-size:12.0pt;font-family:"Arial",sans-serif;color:#4E87A0;mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:5.0pt;font-family:"Arial",sans-serif;mso-fareast-language:FR"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;mso-fareast-language:FR">Tel. : 06 29 70 41 92 | Mail. :
<a href="mailto:mmirra@mcgr.fr"><span style="color:#0563C1">mmirra@mcgr.fr</span></a><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial",sans-serif;mso-fareast-language:FR">281 Route d'Espagne,
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial",sans-serif;mso-fareast-language:FR">31100 Toulouse<o:p></o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:3.0pt;font-family:"Arial",sans-serif;color:#2F5496;mso-fareast-language:FR"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial",sans-serif;mso-fareast-language:FR">05 32 09 38 71 |
</span><span lang="EN-US" style="font-size:12.0pt;mso-fareast-language:FR"><a href="http://www.mcgr.fr/"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:windowtext">www.mcgr.fr</span></a></span><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial",sans-serif;mso-fareast-language:FR"><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif;mso-fareast-language:FR"> 
</span><a href="https://www.facebook.com/groupemcgr/"><span lang="EN-US" style="font-size:12.0pt;color:windowtext;mso-fareast-language:FR;text-decoration:none"><img border="0" width="25" height="25" style="width:.2604in;height:.2604in" id="Image_x0020_2" src="cid:image002.png@01D690F0.EE773970"></span></a><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif;mso-fareast-language:FR">     </span><a href="https://fr.linkedin.com/company/groupemcgr"><span lang="EN-US" style="font-size:12.0pt;color:windowtext;mso-fareast-language:FR;text-decoration:none"><img border="0" width="25" height="25" style="width:.2604in;height:.2604in" id="Image_x0020_3" src="cid:image003.png@01D690F0.EE773970"></span></a><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif;mso-fareast-language:FR">     </span><a href="https://www.youtube.com/channel/UCahBf8ogJuyGlzAczTTtC9w"><span lang="EN-US" style="font-size:12.0pt;color:windowtext;mso-fareast-language:FR;text-decoration:none"><img border="0" width="25" height="25" style="width:.2604in;height:.2604in" id="Image_x0020_4" src="cid:image004.png@01D690F0.EE773970"></span></a><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif;mso-fareast-language:FR"><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:3.0pt;mso-fareast-language:FR"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;mso-fareast-language:FR"><img border="0" width="365" height="26" style="width:3.802in;height:.2708in" id="Image_x0020_5" src="cid:image005.png@01D690F0.EE773970" alt="Une image contenant plane, lumière, blanc, grand

Description générée automatiquement"></span><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial",sans-serif;mso-fareast-language:FR"><o:p></o:p></span></p>
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