Select every N loop

import pymel.core as pm

import maya.mel as mel

def create_win(title):

win_id = 'MyWin'

def close(*pArgs):

if pm.window(win_id, ex=1):

pm.deleteUI(win_id)

if pm.window(win_id, ex=1):

pm.deleteUI(win_id)

def apply(*pArgs):

n = pm.intSliderGrp(n_slider, q=1, v=1)

mel.eval('polySelectEdgesEveryN("edgeRing", {})'.format(n))

pm.window(win_id, t=title, sizeable=0, resizeToFitChildren=1)

pm.rowColumnLayout(p=win_id, nc=1, cw=[(10, 150)], co=[(1, 'left', 5)])

n_slider = pm.intSliderGrp(min=1, max=100, v=1, field=1)

pm.button(l='Apply', c=apply)

pm.button(l='Close', c=close)

pm.showWindow()

create_win('SelectLoopNum')