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How to handle geoprocessing errors in ArcPy pro?
When a geoprocessing tool fails, it throws an arcpy.ExecuteError exception class, which means that you can divide errors into different groups, geoprocessing errors (those that throw the arcpy.ExecuteError exception) and other exception types. You can then handle the errors differently, as demonstrated in the code below:
Why do I need to write a script for ArcPy?
Writing scripts that expect and handle errors can save time and frustration. When a tool returns an error message, ArcPy generates a system error or exception. In Python, you can provide a variety of structures and methods that can handle exceptions. Of course, a script can fail for other reasons not related to a geoprocessing tool.
When do you get an error in ArcGIS Pro?
Parameters are not valid. ERROR 000735: Input Rows: value is required Failed to execute (GetCount). If the call to GetCount_management raises an exception, the Result object is not created. This means you cannot retrieve error messages from the Result object.
What does the try statement in ArcPy do?
If not, AddError will have no effect. arcpy.AddError (e.args [ 0 ]) The try statement has an optional finally clause that can be used for tasks that should always be executed, whether an exception occurs or not.
How to re-create a geoprocessing service output?
Obtain the feature set schema from the server tool, load data to the feature set, pass the feature set to the server tool, and check for the result object. Once completed, save the result to the local dataset. Re-create the original geoprocessing service output using the tool name and result id.
How to save a result in ArcGIS Pro?
If the output of the tool, such as Make Feature Layer, is a layer, getOutput will return a Layer object. Returns the severity of a specific message. Saves the result to a result file. saveToFile is not supported in ArcGIS Pro; use the Package Result tool instead. The index position of the input. The input, either as a recordset or string.
How to debug Python code in ArcGIS Pro?
To debug Python code in ArcGIS Pro, use the following steps to get started: Start Microsoft Visual Studio. On the main menu, click Debug > Attach to Process. On the Attach to Process dialog box, click the Select button. On the Select Code Type dialog box, check Debug these code types, check Python, and click OK.
When to use the finally clause in ArcGIS?
The try statement has an optional finally clause that can be used for tasks that should always be executed, whether an exception occurs or not. In the following example, the ArcGIS 3D Analyst extension is checked in under a finally clause, ensuring that the extension is always checked in.
How to run a geoprocessor in ArcGIS?
Create the geoprocessor object. Add the path to the custom toolbox if you are running a custom tool. Create an IVariantArray and populate it with tool parameter values. The IVariantArray is available through the esriSystem library. Call the Execute method on the geoprocessor. The process is the same if you run a system tool or a custom tool.
How are parameters specified in a geoprocessing tool?
Parameters are specified as strings or objects. Strings are text values that uniquely identify a parameter value, such as a path to a dataset or a keyword. Most tool parameters can be specified as a simple string. However, complex parameters, such as a spatial reference, can be easier to specify with an object.