move a vertex to the position of another vertex (different object) in python? i basically need this:
How do I snap one vertex to the position of another vertex in a different object?
to be done by a python script.

i've managed to move a single vertex along one axis so far..
my problem is, that i struggle with the orientation options in blender.
i would like to select vertices from object2 via index (no problems so far) and copy their location and save these values to the selected vertices of object1.
why is it, that for example bpy.data.meshes['Cube'].vertices[0].co doesn't give you coordinates from 0,0,0? sorry for my noobishness..
I wrote this example script for you. Mind the comments. 

import bpy
import bmesh

# Get the coordinates of the first vertices of 'Plane' object
firstObjData = bpy.context.scene.objects['Plane'].data
bm1 = bmesh.new()
bm1.from_mesh(firstObjData)

bm1.verts.ensure_lookup_table()

# Convert local coorinates to world coordinates before assignment
vertCoordinates = bpy.data.objects['Plane'].matrix_world * bm1.verts[0].co.xyz

print(vertCoordinates)

# Set the coordinates of the first vertices of 'Cube' object
secondObjData = bpy.context.scene.objects['Cube'].data
bm2 = bmesh.new()
bm2.from_mesh(secondObjData)

bm2.verts.ensure_lookup_table()

# Convert world coorinates to local coordinates before assignment
bm2.verts[0].co.xyz = bpy.data.objects['Cube'].matrix_world.inverted() * vertCoordinates 

bm2.to_mesh(secondObjData)