https://community.esri.com/t5/python-questions/searchcursor-inside-updatecursor/m-p/1176283#M64625 <P>Don't nest Cursors. Build a dict with a da.SearchCursor, then refer to that dict in your da.UpdateCursor loop. Here are plenty of examples:</P><P><A href="https://community.esri.com/t5/python-blog/turbo-charging-data-manipulation-with-python/ba-p/884079" target="_self">Turbo Charging Data Manipulation with Python Cursors and Dictionaries</A></P><P>&nbsp;</P> Mon, 23 May 2022 04:58:41 GMT Luke_Pinner 2022-05-23T04:58:41Z https://community.esri.com/t5/python-questions/searchcursor-inside-updatecursor/m-p/1176226#M64623 <P>Hi, I am new to arcpy and trying to automate one of my daily task.</P><P>i want to use Searchcursor Inside UpdateCursor for multiple fc look through. I want to update MPK field form CP fc based on Mains and Service fc. please help.</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="AbhishekOjha_0-1653217093268.png" style="width: 400px;"><img src="https://community.esri.com/t5/image/serverpage/image-id/41893i0E0AA493EF57D163/image-size/medium?v=v2&amp;px=400" role="button" title="AbhishekOjha_0-1653217093268.png" alt="AbhishekOjha_0-1653217093268.png" /></span></P><P>Thank you in advance.</P><P>&nbsp;</P> Sun, 22 May 2022 11:02:02 GMT https://community.esri.com/t5/python-questions/searchcursor-inside-updatecursor/m-p/1176226#M64623 AbhishekOjha 2022-05-22T11:02:02Z https://community.esri.com/t5/python-questions/searchcursor-inside-updatecursor/m-p/1176283#M64625 <P>Don't nest Cursors. Build a dict with a da.SearchCursor, then refer to that dict in your da.UpdateCursor loop. Here are plenty of examples:</P><P><A href="https://community.esri.com/t5/python-blog/turbo-charging-data-manipulation-with-python/ba-p/884079" target="_self">Turbo Charging Data Manipulation with Python Cursors and Dictionaries</A></P><P>&nbsp;</P> Mon, 23 May 2022 04:58:41 GMT https://community.esri.com/t5/python-questions/searchcursor-inside-updatecursor/m-p/1176283#M64625 Luke_Pinner 2022-05-23T04:58:41Z https://community.esri.com/t5/python-questions/searchcursor-inside-updatecursor/m-p/1176284#M64626 <P><SPAN>Thank you, I'll try that.</SPAN></P> Mon, 23 May 2022 05:01:32 GMT https://community.esri.com/t5/python-questions/searchcursor-inside-updatecursor/m-p/1176284#M64626 AbhishekOjha 2022-05-23T05:01:32Z