topic Re: JSONToFeatures_conversion | issues with in_memory and memory in Python Questions

JSONToFeatures_conversion | issues with in_memory and memory

feralcatcolonist_old — Thu, 04 Mar 2021 21:47:43 GMT

So I think that there might be several problems here. JSONToFeatures does not seem to want to output to the "memory" space but it will write to "in_memory"; however, after writing, it does not show up as a feature class using ListFeatureClasses-- --even though it appears as such using describe.

import arcpy #rename to your path, and replace .txt with .json json_input = r"WHATEVERPATH\test.json" arcpy.env.overwriteOutput = True try: arcpy.env.workspace = "memory" arcpy.JSONToFeatures_conversion(json_input, "json_output") except Exception as e: print(f"There's this 000206 Error when running the {arcpy.env.workspace} workspace:\n\n{e}") arcpy.env.workspace = "in_memory" arcpy.JSONToFeatures_conversion(json_input, "json_output") print(f"But it seems to work fine running the {arcpy.env.workspace} workspace") print(f"\n\tThis item exists: {arcpy.Exists('json_output')}") json_in_memory = arcpy.Describe("json_output") print(f"\tThis item is a: {json_in_memory.dataType}") print(f"\tThis item is located at: {json_in_memory.catalogPath}") list_fc = arcpy.ListFeatureClasses() print(f"\n\tBut, when we check our current workspace {arcpy.env.workspace}, it returns no feature classes {list_fc}")

Using the Python Kernel from ArcGIS Pro 2.7.1

Re: JSONToFeatures_conversion | issues with in_memory and memory

DanPatterson — Thu, 04 Mar 2021 21:44:00 GMT

if arcpy.Exists("json_output") # ??? # do you mean if arcpy.Exists(json_input)

Re: JSONToFeatures_conversion | issues with in_memory and memory

feralcatcolonist_old — Thu, 04 Mar 2021 21:46:23 GMT

No, that was a convenience function that I threw in there to assist in running multiple times; I guess I could have set overwrite = True to avoid that confusion.

Re: JSONToFeatures_conversion | issues with in_memory and memory

DanPatterson — Thu, 04 Mar 2021 21:55:02 GMT

well this has nothing to describe

json_in_memory = arcpy.Describe("json_output")

I would suggest dumping the try except block and do something about the non-existent variable (which is just a string)

Re: JSONToFeatures_conversion | issues with in_memory and memory

feralcatcolonist_old — Thu, 04 Mar 2021 22:12:46 GMT

I'm treating that as a path to where that memory feature class is supposed to reside, with the env set these two are equivalent.

json_in_memory = arcpy.Describe("json_output") json_in_memory = arcpy.Describe("in_memory\json_output")

I think the bigger issue here is that JSONToFeatures_conversion gets wonky when it is not writing to a "physical" space like a shapefile, GDB, or similar.

Re: JSONToFeatures_conversion | issues with in_memory and memory

feralcatcolonist_old — Mon, 06 Mar 2023 17:49:40 GMT

For everyone playing along at home; this issue is half-fixed (at ArcGIS Pro 3.1.0). You can now use JSONToFeatures_conversion, but you still cannot ListFeatureClasses() within the memory workspace.

I'll update the sample to some accessible data:

https://d2ad6b4ur7yvpq.cloudfront.net/naturalearth-3.3.0/ne_110m_lakes.geojson

import arcpy # you can grab this data from here https://d2ad6b4ur7yvpq.cloudfront.net/naturalearth-3.3.0/ne_110m_lakes.geojson json_input = r"YOUR_PATH_HERE\ne_110m_lakes.geojson" arcpy.env.overwriteOutput = True try: arcpy.env.workspace = "memory" arcpy.JSONToFeatures_conversion(json_input, "json_output") except Exception as e: print(f"There's this 000206 Error when running the {arcpy.env.workspace} workspace:\n\n{e}") arcpy.env.workspace = "in_memory" arcpy.JSONToFeatures_conversion(json_input, "json_output") print(f"But it seems to work fine running the {arcpy.env.workspace} workspace") print(f"\n\tThis item exists: {arcpy.Exists('json_output')}") json_in_memory = arcpy.Describe("json_output") print(f"\tThis item is a: {json_in_memory.dataType}") print(f"\tThis item is located at: {json_in_memory.catalogPath}") list_fc = arcpy.ListFeatureClasses() print(f"\n\tBut, when we check our current workspace {arcpy.env.workspace}, it returns no feature classes {list_fc}")