Python范围-开始==结束时没有迭代？

Question

As the title says.

Tested using:

for x in range (0,0):
        print(str(x))

I am expecting to see "0", but nothing prints.

I'm using Python 3 and was hoping:

 for x in range(x,y)

Would at least get me one iteration when x == y, but it seems that isn't the case... is there a better way I could be doing this rather than manually handling the x == y scenario?

Answer 1

range is half-inclusive

range(x, y) includes x and excludes y . Use range(x, y + 1) instead, so for your example you'd like to use range(0, 1) in your first codeblock.

Answer 2

As by the documentation of range , range will return the largest start + i * step less than stop. As 0 + step can never be less than 0, it will return an empty list. In your case you would want to use range(x, y + 1) .