def crange(*args)

crange.py

from __future__ import print_function

def crange(*args):
    """crange([start,] stop[, step]) -> xrange object
    
    Make a closed integer range like xrange but with inclusive stop index,
    unless it is not reachable with the given step size.
    
    Examples:
    >>> for x in crange(-2,2): print(x, end=' ')
    -2 -1 0 1 2
    >>> for x in crange(-4,1,2): print(x, end=' ')
    -4 -2 0
    >>> for x in crange(0,9,3): print(x, end=' ')
    0 3 6 9
    >>> for x in crange(9,-2,-3): print(x, end=' ')
    9 6 3 0
    >>> len(crange(0, 100, 1))
    101
    >>> len(crange(0, 100, -10))
    0
    """
    a,n = args,len(args)
    start,stop,step = (0,a[0],1) if n==1 else (a[0],a[1],1) if n==2 else a
    stop += sign(step)
    return xrange(start, stop, step)