import bpy

#super simple export of vert positions, colors and indices
#note: you probably need to run blender as admin to store files

current = bpy.context.object.data

file = open("your path!", "w")

#VERTEX POSITIONS
for vert in current.vertices:
    #get coords
    x  = vert.co[0]
    y  = vert.co[1]
    z  = vert.co[2]
    #formate coords to specific count of decimal places
    xs = str("%.6f" % x)
    ys = str("%.6f" % y)
    zs = str("%.6f" % z)
    #align plus with minus values (beautify output)
    if x >= 0: xs = " " + xs
    if y >= 0: ys = " " + ys
    if z >= 0: zs = " " + zs
    #write
    file.write("p " + xs + " " + ys + " " + zs + "\n")

#VERTEX COLORS
for col in current.vertex_colors:
    print(col.data)
    for c in col.data:
        #get colors and formate colors to specific count of decimal places
        r  = str("%.6f" % c.color[0])
        g  = str("%.6f" % c.color[1])
        b  = str("%.6f" % c.color[2])
        a  = str("%.6f" % c.color[3])
        #write
        file.write("c " + r + " " + g + " " + b + " " + a + "\n")

#TRIANGLES
#triangulate faces before!
for poly in current.polygons:
    #get indices
    i1 = str(poly.vertices[0])
    i2 = str(poly.vertices[1])
    i3 = str(poly.vertices[2])
    #write
    file.write("i " + i1 + " " + i2 + " " + i3 + "\n")

file.close()