Export all Shape Keys from Blender to OBJ files

export-all-shape-keys.py

# Export all Shape Keys as OBJs in Blender
# Version 1.0 - August 2017
# =========================================
# Original Script by Tlousky
# https://blender.stackexchange.com/questions/86674/how-to-batch-export-shapekeys-as-obj-from-the-active-object/86678#86678
# with small tweaks by Jay Versluis 
# https://www.versluis.com

import bpy
from os.path import join

# Reference the active object
o = bpy.context.active_object 

# CHANGE THIS to the folder you want to save your OBJ files in
# NOTE: no spaces, no trailing slash
exportPath = "/Users/you/somewhere" 

# Reset all shape keys to 0 (skipping the Basis shape on index 0
for skblock in o.data.shape_keys.key_blocks[1:]:
    skblock.value = 0

# Iterate over shape key blocks and save each as an OBJ file
for skblock in o.data.shape_keys.key_blocks[1:]:
    skblock.value = 1.0  # Set shape key value to max

    # Set OBJ file path and Export OBJ
    objFileName = skblock.name + ".obj" # File name = shapekey name
    objPath = join( exportPath, objFileName )
    bpy.ops.export_scene.obj( filepath = objPath, use_selection = True, global_scale = 1 )

    skblock.value = 0 # Reset shape key value to 0

# THE END

bpy.ops.wm.obj_export(filepath = objPath,export_selected_objects=True,export_uv=True,scaling_factor=1.0,apply_modifiers=True,export_materials=False)

Thanks! It works. I mean, I get the basic things working. Need to test this with complex UV Maps.

In 4.2.2 I had to change the expression for scaling back to global_scale:
bpy.ops.wm.obj_export(filepath = objPath,export_selected_objects=True,export_uv=True,global_scale=1.0,apply_modifiers=True,export_materials=False)