示例#1
0
 def __init__(self, first, last=None, step=None):
     AllExpression.__init__(self, step)
     first = asint(first)
     last = asint(last)
     if last is None and step is None:
         last = first
     if last is not None and first > last:
         raise ValueError('The minimum value in a range must not be '
                          'higher than the maximum')
     self.first = first
     self.last = last
示例#2
0
 def __init__(self, step=None):
     self.step = asint(step)
     if self.step == 0:
         raise ValueError('Increment must be higher than 0')