![]() ![]() The indentation level (two spaces or four spaces) does not matter as long as it is consistent throughout the code block. In Python, proper indentation is part of the syntax. See examples of using the Data Type parameter. For example, if you use this tool to calculate a distance for use as input to the Buffer Distance parameter of the Buffer tool, specify Linear Unit for the Data Type parameter value. The Data Type parameter is used in ModelBuilder to help chain the output of this tool with other tools. ArcGIS provides Model Builder, a graphical user interface (GUI) which can be used to drag and drop tools to create models which will run the tools in. See examples of using the Code Block parameter. To do this, create a function definition in the Code Block parameter and reference the definition in the Expression parameter. To the model window, add the Clip tool (in the Analysis Tools toolbox. ![]() Rename the model Clip, by right clicking on the model icon in the list under the toolbox and selecting rename, then typing the new name. These variables must be passed to the code block from the expression. From ArcMap, create a new model in your toolbox by right clicking on the Site selection toolbox and selecting New-> model. You cannot access model variables in the Code Block parameter. To use a Python function in an expression, double-click a function in the Functions list to add it to the Expression parameter. To use a variable in the expression, enclose the variable name in percent signs (%) or double-click the variable name in the Variables list to add it to the Expression parameter. Iteratively process every feature class, raster, file, or table in a workspace. Variables created in ModelBuilder can be used by this tool, but they cannot be used directly in the Expression parameter. ModelBuilder in ArcGIS Pro allows you to do the following: Build a model by adding and connecting data and tools. See examples of using the Expression parameter. The Code Block parameter cannot be used on its own it must be used in conjunction with the Expression parameter. Use the Code Block parameter for more complicated expressions, such as multiline calculations or logical operations (if, then). Use the Expression parameter for short one line expressions. Other scripting languages are not supported. The Expression parameter only supports Python expressions. The tool is not available from the Geoprocessing pane or from Python. This tool is only available from the ModelBuilder ribbon for use in models. ![]()
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