[英]Converting hexadecimal value to decimal in Python
I just started working with hexadecimal values in python and am a bit surprised with what I just encountered. 我刚刚开始使用python中的十六进制值,我对刚刚遇到的内容感到有些惊讶。 I expected the following code to first print a hexadecimal string, and then a decimal value.
我期望以下代码首先打印十六进制字符串,然后是十进制值。
Input: 输入:
n = 0x8F033CAE74F88BA10D2BEA35FFB0EDD3
print('Hex value for n is:', n)
print('Dec value for n is:', int(str(n), 16))
Output: 输出:
Hex value for n is: 190096411054295805012706659640261275091
n的十六进制值是:190096411054295805012706659640261275091
Dec value for n is: 8921116140846515089057635273465667902228615313
n的Dec值为:8921116140846515089057635273465667902228615313
How is it possible that 2 different different numbers are shown? 如何显示2个不同的不同数字? I expected the first number to be a hexadecimal string and the second it's decimal equivalent, what is this second value in this case?
我期望第一个数字是十六进制字符串,第二个数字是十进制等效数,在这种情况下,第二个值是多少?
0x
is a way to input an integer with an hexadecimal notation. 0x
是一种使用十六进制表示法输入整数的方法。
>>> n = 0x8F033CAE74F88BA10D2BEA35FFB0EDD3
This hexadecimal notation is forgotten directly after instantiation, though: 实例化后,这个十六进制表示法会被直接忘记,但是:
>>> n
190096411054295805012706659640261275091
>>> str(n)
'190096411054295805012706659640261275091'
So when you call int(str(n), 16)
, Python interprets '190096411054295805012706659640261275091'
as an hexadecimal number: 所以当你调用
int(str(n), 16)
,Python将'190096411054295805012706659640261275091'
解释为十六进制数:
>>> int(str(n), 16)
8921116140846515089057635273465667902228615313
You need to input the original hex string: 您需要输入原始十六进制字符串:
>>> int("8F033CAE74F88BA10D2BEA35FFB0EDD3", 16)
190096411054295805012706659640261275091
>>> int(hex(n), 16)
190096411054295805012706659640261275091
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