topic Re: Detect empty parameters in ToolValidator? in Python Questions https://community.esri.com/t5/python-questions/detect-empty-parameters-in-toolvalidator/m-p/464497#M36381 <HTML><HEAD></HEAD><BODY><PRE class="lia-code-sample line-numbers language-none">if not self.params[0].value: &nbsp;&nbsp; &lt;add some error message&gt;</PRE></BODY></HTML> Sat, 11 Dec 2021 20:37:49 GMT LoganPugh 2021-12-11T20:37:49Z Detect empty parameters in ToolValidator? https://community.esri.com/t5/python-questions/detect-empty-parameters-in-toolvalidator/m-p/464496#M36380 <HTML><HEAD></HEAD><BODY><SPAN>This may be a dumb question, but how do you determine in the ToolValidator class whether an input parameter has been left blank?</SPAN><BR /><BR /><SPAN>Some of the parameters in my tool are optional in some cases, and required in others.&nbsp; I would like to raise an error when a field is left blank under certain circumstances.</SPAN></BODY></HTML> Wed, 07 Dec 2011 16:25:56 GMT https://community.esri.com/t5/python-questions/detect-empty-parameters-in-toolvalidator/m-p/464496#M36380 JamesHook 2011-12-07T16:25:56Z Re: Detect empty parameters in ToolValidator? https://community.esri.com/t5/python-questions/detect-empty-parameters-in-toolvalidator/m-p/464497#M36381 <HTML><HEAD></HEAD><BODY><PRE class="lia-code-sample line-numbers language-none">if not self.params[0].value: &nbsp;&nbsp; &lt;add some error message&gt;</PRE></BODY></HTML> Sat, 11 Dec 2021 20:37:49 GMT https://community.esri.com/t5/python-questions/detect-empty-parameters-in-toolvalidator/m-p/464497#M36381 LoganPugh 2021-12-11T20:37:49Z Re: Detect empty parameters in ToolValidator? https://community.esri.com/t5/python-questions/detect-empty-parameters-in-toolvalidator/m-p/464498#M36382 <HTML><HEAD></HEAD><BODY><SPAN>Thanks for your help!</SPAN></BODY></HTML> Thu, 08 Dec 2011 14:17:43 GMT https://community.esri.com/t5/python-questions/detect-empty-parameters-in-toolvalidator/m-p/464498#M36382 JamesHook 2011-12-08T14:17:43Z