https://community.esri.com/t5/python-questions/python-doesn-t-work-in-field-calculator/m-p/1128868#M63342 <P>Merry Christmas to everyone,</P><P>I'm trying this code in field calculator tool but something is wrong with python. It seems that doesn't validate the code, doesn't recognize the len and replace function as reserved words. And, when I tries to execute the tool it shows an error "2 parameters are missing or invalid".</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="RicardoSanabria1_0-1640558151880.png" style="width: 400px;"><img src="https://community.esri.com/t5/image/serverpage/image-id/30358iFB875B7943779BAD/image-size/medium?v=v2&amp;px=400" role="button" title="RicardoSanabria1_0-1640558151880.png" alt="RicardoSanabria1_0-1640558151880.png" /></span></P><P>I tried restarting the laptop, but it doesn't work.</P><P>&nbsp;</P><P>Best regards,</P> Sun, 26 Dec 2021 22:36:25 GMT RicardoSanabria1 2021-12-26T22:36:25Z https://community.esri.com/t5/python-questions/python-doesn-t-work-in-field-calculator/m-p/1128868#M63342 <P>Merry Christmas to everyone,</P><P>I'm trying this code in field calculator tool but something is wrong with python. It seems that doesn't validate the code, doesn't recognize the len and replace function as reserved words. And, when I tries to execute the tool it shows an error "2 parameters are missing or invalid".</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="RicardoSanabria1_0-1640558151880.png" style="width: 400px;"><img src="https://community.esri.com/t5/image/serverpage/image-id/30358iFB875B7943779BAD/image-size/medium?v=v2&amp;px=400" role="button" title="RicardoSanabria1_0-1640558151880.png" alt="RicardoSanabria1_0-1640558151880.png" /></span></P><P>I tried restarting the laptop, but it doesn't work.</P><P>&nbsp;</P><P>Best regards,</P> Sun, 26 Dec 2021 22:36:25 GMT https://community.esri.com/t5/python-questions/python-doesn-t-work-in-field-calculator/m-p/1128868#M63342 RicardoSanabria1 2021-12-26T22:36:25Z https://community.esri.com/t5/python-questions/python-doesn-t-work-in-field-calculator/m-p/1128870#M63344 <P>your code block has to be a "def" as in the help topics</P><P><A href="https://pro.arcgis.com/en/pro-app/latest/tool-reference/modelbuilder-toolbox/examples-of-using-calculate-value-tool.htm" target="_blank">Examples of using Calculate Value—ArcGIS Pro | Documentation</A></P><P>modify the example to suit</P><LI-CODE lang="python">txt = "a, b, c, d" def func(val): """replace""" return len(val) - len(val.replace(",", "")) func(txt) 3</LI-CODE><P>&nbsp;</P> Sun, 26 Dec 2021 23:00:03 GMT https://community.esri.com/t5/python-questions/python-doesn-t-work-in-field-calculator/m-p/1128870#M63344 DanPatterson 2021-12-26T23:00:03Z