如何将 float decimal 转换为 float octal/binary？

Question

我到处搜索以找到将浮点数转换为八进制或二进制的方法。我知道 float.hex 和 float.fromhex。是否有模块可以为 octal/binary 值做同样的工作？

例如：我有一个浮点数 12.325，我应该得到八进制浮点数 14.246。告诉我，我该怎么做？提前致谢。

Answer 1

您可以自己编写，如果您只关心小数点后三位，则将 n 设置为 3：

def frac_to_oct(f, n=4):
    # store the number before the decimal point
    whole = int(f)
    rem = (f - whole) * 8
    int_ = int(rem)
    rem = (rem - int_) * 8
    octals = [str(int_)]
    count = 1
    # loop until 8 * rem gives you a whole num or n times
    while rem and count < n:
        count += 1
        int_ = int(rem)
        rem = (rem - int_) * 8
        octals.append(str(int_))
    return float("{:o}.{}".format(whole, "".join(octals)))

使用您的输入 12.325:

In [9]: frac_to_oct(12.325)
Out[9]: 14.2463
In [10]: frac_to_oct(121212.325, 4)
Out[10]: 354574.2463

In [11]: frac_to_oct(0.325, 4)
Out[11]: 0.2463
In [12]: frac_to_oct(2.1, 4)
Out[12]: 2.0631
In [13]:  frac_to_oct(0)
Out[13]: 0.0
In [14]:  frac_to_oct(33)
Out[14]: 41.0

Answer 2

解决方法如下，解释如下：

def ToLessThanOne(num): # Change "num" into a decimal <1
    while num > 1:
        num /= 10
    return num

def FloatToOctal(flo, places=8): # Flo is float, places is octal places
    main, dec = str(flo).split(".") # Split into Main (integer component)
                                    # and Dec (decimal component)
    main, dec = int(main), int(dec) # Turn into integers

    res = oct(main)[2::]+"." # Turn the integer component into an octal value
                             # while removing the "ox" that would normally appear ([2::])
                             # Also, res means result

    # NOTE: main and dec are being recycled here

    for x in range(places): 
        main, dec = str((ToLessThanOne(dec))*8).split(".") # main is integer octal
                                                           # component
                                                           # dec is octal point
                                                           # component
        dec = int(dec) # make dec an integer

        res += main # Add the octal num to the end of the result

    return res # finally return the result

所以你可以做 print(FloatToOctal(12.325)) 它会打印出 14.246314631

最后，如果你想要更少的八进制位（小数位但八进制）只需添加 places 参数：print(FloatToOctal(12.325, 3)) which returns 14.246 as is correct according to到这个网站：http://coderstoolbox.net/number/

如何将 float decimal 转换为 float octal/binary？

How do I convert float decimal to float octal/binary?

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octal