https://community.esri.com/t5/arcmap-questions/python-field-calculations-across-different-fields/m-p/1347446#M4677 <P>Update: I learned I just have to be patient with ArcMap, because after reopening the map document, it ran, and my null values were updated.</P><P>&nbsp;</P> Thu, 09 Nov 2023 00:07:29 GMT lilyblackcpud 2023-11-09T00:07:29Z https://community.esri.com/t5/arcmap-questions/python-field-calculations-across-different-fields/m-p/1347416#M4675 <P>I am trying to run a field calculation in ArcMap using conditional statements using Python Parser. My goal is for it to recognize phasing text (ex. 'ABC') from the field (gs_phase), and return the field that contains the shape length (gs_line_defined_length), and multiply it by a value that matches the phasing (4 for 'ABC' example). I am trying to calculate how much conductor is in our system, but multiphased spans are captured under one line segment (even if there are multiple lines).</P><P>I am very much a Python beginner, and I have gotten it to run without errors, but it produces only null values in my new field, any insight would be greatly appreciated.</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="script_example.PNG" style="width: 441px;"><img src="https://community.esri.com/t5/image/serverpage/image-id/85429i9862823A56ECB165/image-size/large?v=v2&amp;px=999" role="button" title="script_example.PNG" alt="script_example.PNG" /></span></P> Wed, 08 Nov 2023 21:04:11 GMT https://community.esri.com/t5/arcmap-questions/python-field-calculations-across-different-fields/m-p/1347416#M4675 lilyblackcpud 2023-11-08T21:04:11Z https://community.esri.com/t5/arcmap-questions/python-field-calculations-across-different-fields/m-p/1347446#M4677 <P>Update: I learned I just have to be patient with ArcMap, because after reopening the map document, it ran, and my null values were updated.</P><P>&nbsp;</P> Thu, 09 Nov 2023 00:07:29 GMT https://community.esri.com/t5/arcmap-questions/python-field-calculations-across-different-fields/m-p/1347446#M4677 lilyblackcpud 2023-11-09T00:07:29Z