def uvtex_unit_number(uvtex):
dot = uvtex.name.find('.')
if dot!=-1 and uvtex.name[dot+1:dot+5]=="unit" and uvtex.name[dot+5:].isdigit():
def uvtex_unit_number(uvtex):
dot = uvtex.name.find('.')
if dot!=-1 and uvtex.name[dot+1:dot+5]=="unit" and uvtex.name[dot+5:].isdigit():