浮动到二进制<->二进制浮动转换

Question

我想将浮点数转换为二进制字符串并返回。

我尝试这样做：

import struct 
from ast import literal_eval 


float_to_binary = bin(struct.unpack('!i',struct.pack('!f', 3.14))[0]) 
print (float_to_binary) 

binary_to_float = float(int(float_to_binary, 0)) 
print (binary_to_float) 


result = float(literal_eval(float_to_binary)) 
print (result) #wrong, prints 1078523331.0, should be 3.14 

Answer 1

这不会做你认为：

binary_to_float = float(int(float_to_binary, 0)) 

它不会重新解释数据，而是将整数浮动，例如1234至1234.0。

你可以使用：

>>> from struct import * 
>>> 
>>> # float -> binary 
>>> bin(unpack('I', pack('f', 3.14))[0]) 
'0b1000000010010001111010111000011' 
>>> 
>>> 
>>> # binary -> float 
>>> unpack('f', pack('I', 0b1000000010010001111010111000011))[0] 
(3.140000104904175,) 
>>>