this is how I would write it - all the indentations are correct

import poser, os,os.path

scn = poser.Scene()
fig = scn.CurrentFigure()

def ActVisible(act,toggle,frame):
    scn.SetFrame(frame)
    act.SetVisible(toggle)

def ImportObj(cfile):
    imex = scn.ImExporter()
    options = imex.ImportOptions("obj", None)
    options[poser.kImOptCodeMAKEPOLYNORMSCONSISTENT] = 0
    options[poser.kImOptCodeOFFSETZ] = 0.0
    options[poser.kImOptCodeOFFSETY] = 0.0
    options[poser.kImOptCodeOFFSETX] = 0.0
    options[poser.kImOptCodeFLIPUTEXTCOORDS] = 0
    options[poser.kImOptCodeWELDIDENTICALVERTS] = 0
    options[poser.kImOptCodeCENTERED] = 0
    options[poser.kImOptCodePERCENTFIGSIZE] = 0
    options[poser.kImOptCodeFLIPVTEXTCOORDS] = 0
    options[poser.kImOptCodeFLIPNORMS] = 0
    options[poser.kImOptCodePLACEONFLOOR] = 0
    imex.Import('obj', 'File Format Wavefront', cfile, options)

sdir = os.path.join('c:', os.sep , 'users')

frame = 0
myfiles = os.listdir(sdir)
print myfiles
for myfile in myfiles:
if myfile.endswith('.obj'):
    cfile = os.path.join(sdir, myfile)
    try:
        ImportObj(cfile)
    
        act = scn.CurrentActor()
        act.SetName(myfile[:-4])
        ActVisible(act,1,0)

        frame += 1
        scn.SetFrame(frame)
        ActVisible(act,1,frame)
        if frame > 2:
            scn.SetFrame(frame - 2)
            ActVisible(act,0,frame)
        scn.SetFrame(frame)
    except:
        print 'error on ', myfile
print 'done'

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