topic Re: Need Help with Math Operand Error in Python Questions https://community.esri.com/t5/python-questions/need-help-with-math-operand-error/m-p/384369#M30283 <HTML><HEAD></HEAD><BODY><SPAN>You probably have a null value in your row.</SPAN><BR /><SPAN>This should get you around that.</SPAN><BR /><PRE class="lia-code-sample line-numbers language-none"> if row[0]: &nbsp;&nbsp;&nbsp; row[2] = row[0] * (32.82010551 * 32.82010551) * (0.000000092903) &nbsp;&nbsp;&nbsp; if row[1]: &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; row[3] = (row[1] *(32.82010551 * 32.82010551) * 25)/(row[0] * (32.82010551 * 32.82010551))</PRE></BODY></HTML> Sat, 11 Dec 2021 17:41:13 GMT MathewCoyle 2021-12-11T17:41:13Z Need Help with Math Operand Error https://community.esri.com/t5/python-questions/need-help-with-math-operand-error/m-p/384368#M30282 <HTML><HEAD></HEAD><BODY><SPAN>Okay I have the following code</SPAN><BR /><PRE class="lia-code-sample line-numbers language-none"> with arcpy.da.UpdateCursor(fc, fields) as rows: &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; for row in rows: &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; row[2] = row[0] * (32.82010551 * 32.82010551) * (0.000000092903) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; row[3] = (row[1] *(32.82010551 * 32.82010551) * 25)/(row[0] * (32.82010551 * 32.82010551)) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; rows.updateRow(row)</PRE><BR /><BR /><SPAN>Where I get this error:</SPAN><BR /><BR /><SPAN>PYTHON ERRORS:</SPAN><BR /><SPAN>Traceback info:</SPAN><BR /><SPAN> File "G:\Scripts\Threshold_IP_Scripts\GetStreamStatsA.py", line 32, in StreamStatistics</SPAN><BR /><SPAN> row[2] = row[0] * (32.82010551 * 32.82010551) * (0.000000092903)</SPAN><BR /><BR /><SPAN>Error Info:</SPAN><BR /><SPAN>unsupported operand type(s) for *: 'NoneType' and 'float'</SPAN><BR /><BR /><SPAN>ArcPy ERRORS:</SPAN><BR /><BR /><SPAN>Any ideas? I am stuck!</SPAN></BODY></HTML> Sun, 12 Dec 2021 16:24:43 GMT https://community.esri.com/t5/python-questions/need-help-with-math-operand-error/m-p/384368#M30282 ChristopherClark1 2021-12-12T16:24:43Z Re: Need Help with Math Operand Error https://community.esri.com/t5/python-questions/need-help-with-math-operand-error/m-p/384369#M30283 <HTML><HEAD></HEAD><BODY><SPAN>You probably have a null value in your row.</SPAN><BR /><SPAN>This should get you around that.</SPAN><BR /><PRE class="lia-code-sample line-numbers language-none"> if row[0]: &nbsp;&nbsp;&nbsp; row[2] = row[0] * (32.82010551 * 32.82010551) * (0.000000092903) &nbsp;&nbsp;&nbsp; if row[1]: &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; row[3] = (row[1] *(32.82010551 * 32.82010551) * 25)/(row[0] * (32.82010551 * 32.82010551))</PRE></BODY></HTML> Sat, 11 Dec 2021 17:41:13 GMT https://community.esri.com/t5/python-questions/need-help-with-math-operand-error/m-p/384369#M30283 MathewCoyle 2021-12-11T17:41:13Z Re: Need Help with Math Operand Error https://community.esri.com/t5/python-questions/need-help-with-math-operand-error/m-p/384370#M30284 <HTML><HEAD></HEAD><BODY><SPAN>Sorry I am confused. Where do I put that code?</SPAN></BODY></HTML> Thu, 25 Apr 2013 22:01:31 GMT https://community.esri.com/t5/python-questions/need-help-with-math-operand-error/m-p/384370#M30284 ChristopherClark1 2013-04-25T22:01:31Z Re: Need Help with Math Operand Error https://community.esri.com/t5/python-questions/need-help-with-math-operand-error/m-p/384371#M30285 <HTML><HEAD></HEAD><BODY><SPAN>Is this correct?</SPAN><BR /><BR /><PRE class="lia-code-sample line-numbers language-none"> fields = ['RASTERVALU_12', 'RASTERVALU_12_13', 'Cumm_Dr_SQKM', 'Mean_Pr_MM'] &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; with arcpy.da.UpdateCursor(fc, fields) as rows: &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; for row in rows: &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if row[0]: &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; row[2] = row[0] * (32.82010551 * 32.82010551) * (0.000000092903) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if row[1]: &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; row[3] = (row[1] *(32.82010551 * 32.82010551) * 25)/(row[0] * (32.82010551 * 32.82010551)) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; rows.updateRow(row)</PRE></BODY></HTML> Sat, 11 Dec 2021 17:41:16 GMT https://community.esri.com/t5/python-questions/need-help-with-math-operand-error/m-p/384371#M30285 ChristopherClark1 2021-12-11T17:41:16Z