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arcpy.mp listColorRamps() returns empty list ?

Question asked by molly.barth on Aug 29, 2018
Latest reply on Aug 30, 2018 by Dan_Patterson

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Hi,

I have been using arcpy.mp to automate map production but am having trouble with the listColorRamps() method.

I am running Python 3.6.5 and ArcPro 2.2.1.

If I run this code in the python window within an open aprx, I get a long list of available Color Ramp objects:

aprx=mp.ArcGISProject("CURRENT")

aprx.listColorRamps()

However, if I run similar code in IDLE, aprx.ListColorRamps() returns an empty list, and the rest of my map automation therefore fails.

aprx=mp.ArcGISProject(path+"/template.aprx")
aprx.listColorRamps()

Has anyone else experienced this and/or know of a workaround?

Thank you!

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Dan_Patterson

Aug 29, 2018 1:19 PM

something is amiss

pth = r"C:\GIS\A_Tools_scripts\aprx_info\aprx_info.aprx"

proj = arcpy.mp.ArcGISProject(pth)

cr = proj.listColorRamps()[:2]

cr
Out[16]: 
[<MappingColorRampObject at 0x298e44a1fd0>,
 <MappingColorRampObject at 0x298e44a1d00>]

check your path to begin with and I noticed that you don't have arcpy before mp… could be a namespace issue.

I recommend not shortcutting shortcuts in code. And you can get its name and that is about all

cr0 = cr[0]
cr0.name
Out[21]: 'Accent (3 Classes)'

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molly.barth @ Dan_Patterson on Aug 30, 2018 10:05 AM

Thanks for the help. However, I tried the code as you describe above using the full arcpy.mp call and still no luck ... I get an empty list when calling listColorRamps().

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Dan_Patterson

@ molly.barth on Aug 30, 2018 10:14 AM

Then if it doesn't work with a direct reference to the *.aprx nor with "CURRENT", that leaves something else... maybe even your installation.

Try a different project for a starter.

If you can try with a different user on your computer, I would as well.

If you have cohorts where you are, try on their machine.

Got to rule out the project, the machine and the user. You hopefully have done the reading from the *.aprx and "CURRENT" to rule that out.

Post back with more info Molly.

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3 Replies

Dan_Patterson Aug 29, 2018 1:19 PM
Mark Correct
Correct Answer
something is amiss
```
pth = r"C:\GIS\A_Tools_scripts\aprx_info\aprx_info.aprx"

proj = arcpy.mp.ArcGISProject(pth)

cr = proj.listColorRamps()[:2]

cr
Out[16]: 
[<MappingColorRampObject at 0x298e44a1fd0>,
 <MappingColorRampObject at 0x298e44a1d00>]
```
check your path to begin with and I noticed that you don't have arcpy before mp… could be a namespace issue.
I recommend not shortcutting shortcuts in code. And you can get its name and that is about all
```
cr0 = cr[0]
cr0.name
Out[21]: 'Accent (3 Classes)'
```
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- molly.barth @ Dan_Patterson on Aug 30, 2018 10:05 AM
  Mark Correct
  Correct Answer
  Thanks for the help. However, I tried the code as you describe above using the full arcpy.mp call and still no luck ... I get an empty list when calling listColorRamps().
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  - Dan_Patterson @ molly.barth on Aug 30, 2018 10:14 AM
    Mark Correct
    Correct Answer
    Then if it doesn't work with a direct reference to the *.aprx nor with "CURRENT", that leaves something else... maybe even your installation.
    Try a different project for a starter.
    If you can try with a different user on your computer, I would as well.
    If you have cohorts where you are, try on their machine.
    
    Got to rule out the project, the machine and the user. You hopefully have done the reading from the *.aprx and "CURRENT" to rule that out.
    Post back with more info Molly.
    1 person found this helpful
    Like • Show 0 Likes0
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arcpy.mp listColorRamps() returns empty list ?

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