Ways to move a TopoDS_shape:

# TopLoc_Location
# as shown in 
tFace = BRepBuilderAPI_MakeFace(mFace).Face()
faceNormal = Construct.face_normal(mFace)
vctr = gp_Vec(faceNormal).Multiplied(value)
trsf = gp_Trsf()
trsf.SetTranslation(vctr)
tFace.Move(TopLoc_Location(trsf))

# BRepBuilderAPI_Transform
# as shown in core_topology_boolean.py

def translate_topods_from_vector(brep_or_iterable, vec, copy=False):
    '''
    translate a brep over a vector
    @param brep:    the Topo_DS to translate
    @param vec:     the vector defining the translation
    @param copy:    copies to brep if True
    '''
    trns = gp_Trsf()
    trns.SetTranslation(vec)
    brep_trns = BRepBuilderAPI_Transform(brep_or_iterable, trns, copy)
    brep_trns.Build()
    return brep_trns.Shape()


# as shown in core_classic_occ_bottle.py
# Create a wire out of the edges
aWire = BRepBuilderAPI_MakeWire(aEdge1.Edge(), aEdge2.Edge(), aEdge3.Edge())

# Quick way to specify the X axis
xAxis = gp_OX()

# Set up the mirror
aTrsf = gp_Trsf()
aTrsf.SetMirror(xAxis)

# Apply the mirror transformation
aBRespTrsf = BRepBuilderAPI_Transform(aWire.Wire(), aTrsf)

# Get the mirrored shape back out of the transformation and convert back to a wire
aMirroredShape = aBRespTrsf.Shape()

# A wire instead of a generic shape now
aMirroredWire = topods.Wire(aMirroredShape)