def aspect (v):
if v <= 0:
cli.wrong_usage (__doc__, 'aspect ratio must be greater than zero')
return v
def aspect(v):
if v <= 0:
cli.wrong_usage(__doc__, 'aspect ratio must be greater than zero')
return v
def range (v):
if v[0] >= v[1]:
cli.wrong_usage (__doc__, 'data range must have min < max')
return v
def range(v):
if v[0] >= v[1]:
cli.wrong_usage(__doc__, 'data range must have min < max')
return v