How to return the number in socket.inet_aton?

Question

There is a function on mysql:

select inet_ntoa(4294967295 & '-1136577616');

res = 188.65.51.176

How to make a function on python?

score 1 · Accepted Answer · edited May 23 '17 at 12:21

1

Python 2.7.3

import socket, struct

packed_value = struct.pack('!I', 4294967295 & int('-1136577616'))
addr = socket.inet_ntoa(packed_value)

print addr

edited May 23 '17 at 12:21

Community

answered Jul 10 '13 at 03:17

furas

How to get back the number of? In [49]: struct.unpack('>L',socket.inet_aton('188.65.51.176'))[0] Out[49]: 3158389680L – avdoshkin Jul 10 '13 at 03:54
4294967295 & int('-1136577616') == 3158389680L . And you can't get better result. You can't reverse `&` (bit AND). 7 & 1 = 1 and 5 & 1 = 1 so different numbers give the same result. – furas Jul 10 '13 at 04:16
How to get the result then? – avdoshkin Jul 10 '13 at 04:24
You can't reverse `&` so you can't get `4294967295` or `-1136577616` from `3158389680L`. See also: [How to reverse bitwise AND (&) in C?](http://stackoverflow.com/a/2566235/1832058) – furas Jul 10 '13 at 05:28

1 Answers1