I want to use edge slide operation using python. But I got error "RuntimeError: Operator bpy.ops.transform.edge_slide.poll() expected a view3d region & editmesh".

I searched and found several solutions for loop cuts but didn't find specifically for edge loops. I modified the loop cut script for edge loop but didn't work. can anyone help?

links are: Loop Cut and Slide using Python not working

How to use loopcut_slide operation without any UI?

  • $\begingroup$ Hello, Thanks for your concern. I found the solution by doing some research by myself. $\endgroup$
    – dip deb
    Dec 6, 2021 at 9:35

1 Answer 1


Here's the answer which solved my problem. I need to find out area in view 3d and other related info pack those things into override variable and put that variable at the first input of edge_slide function.

import bpy
def view3d_find( return_area = False ):

    for area in bpy.context.window.screen.areas:
        if area.type == 'VIEW_3D':
            v3d = area.spaces[0]
            for region in area.regions:
                if region.type == 'WINDOW':
                    if return_area: return region, v3d, area
region, v3d, area = view3d_find(True)
#we need to put those values into a single variable in the following
override = {
    'scene': bpy.context.scene,'region' : region,'area': area,'space': v3d}
#must be in edit mode
bpy.ops.transform.edge_slide(override,value=0.3,  mirror=True, correct_uv=True)

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