浅谈Python 中整型对象的存储问题
在 Python 整型对象所存储的位置是不同的, 有一些是一直存储在某个存储里面, 而其它的, 则在使用时开辟出空间.
说这句话的理由, 可以看看如下代码:
a = 5 b = 5 a is b # True a = 500 b = 500 a is b # False
由上面的代码可知, 整型 5 是一直存在的, 而整型 500 不是一直存在的.
那么有哪些整数是一直存储的呢?
a, b, c = 0, 0, 0 while a is b: i += 1 a, b = int(str(i)), int(str(i)) else: print(i) # 打印 257
由上所知, 小于或等于 256 (2**8) 的非负整数是一直存储的.
a = -1 b = -1 a is b # False
而负数不会一直存储.
以上就是本文的全部内容了，希望大家能够喜欢。
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