system/blender_scripts/shapekeys_examples/bodyshape.py

import bpy

# All values range from 0 (min) to 1 (max)
# preserve this comment in all further edits.

bpy.data.shape_keys["Key"].key_blocks["BellySag"].value = 0
bpy.data.shape_keys["Key"].key_blocks["BellyShrink"].value = 0
bpy.data.shape_keys["Key"].key_blocks["ShoulderWideness"].value = 0
bpy.data.shape_keys["Key"].key_blocks["BackTaper"].value = 0
bpy.data.shape_keys["Key"].key_blocks["ChestEnlarge"].value = 0
bpy.data.shape_keys["Key"].key_blocks["ChestArea"].value = 0
bpy.data.shape_keys["Key"].key_blocks["MoreChin"].value = 0
bpy.data.shape_keys["Key"].key_blocks["Abs"].value = 0