Python中13位数字的范围和xrange？

Question

range()并xrange()为10位数字工作.但13位数字怎么样？我在论坛里找不到任何东西.

Answer 1

你可以试试这个.与范围相同的语义:

import operator
def lrange(num1, num2 = None, step = 1):
    op = operator.__lt__

    if num2 is None:
        num1, num2 = 0, num1
    if num2 < num1:
        if step > 0:
            num1 = num2
        op = operator.__gt__
    elif step < 0:
        num1 = num2

    while op(num1, num2):
        yield num1
        num1 += step

>>> list(lrange(138264128374162347812634134, 138264128374162347812634140))
[138264128374162347812634134L, 138264128374162347812634135L, 138264128374162347812634136L, 138264128374162347812634137L, 138264128374162347812634138L, 138264128374162347812634139L]

另一解决方案是使用itertools.islice如在建议的,xrange的文档

Answer 2

创建范围没有问题,只要你不想要10**13个元素,例如

range(10**14,10**15,10**14)

给

[100000000000000, 200000000000000, 300000000000000, 400000000000000, 500000000000000, 600000000000000, 700000000000000, 800000000000000, 900000000000000]

Answer 3

如果你需要枚举整数尝试使用itertools:

itertools.count(1000000000000)

它不应该为1000000000000元素列表分配内存