Mesh->Curve

meshToCurve.py

import pymel.core as pm

def meshToCurve():

    selectMesh = pm.ls(sl=True)
    for mesh in selectMesh:
        grp  = pm.group(em=True,n=mesh.name()+"_Grp")
        mesh = mesh.getShape()
        faceCount = mesh.numFaces()

        for i in range(0,faceCount):
            edge = mesh.f[i].getEdges()
            pm.select(cl=True)
            for j in edge:
                mesh.e[j].select(add=True)

            cv = pm.polyToCurve(degree=1)
            pm.parent(cv[0],grp)