[英]How do I convert float decimal to float octal/binary?
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
。 是否有一个模块可以对八进制/二进制值做同样的工作?
例如:我有一个浮点数12.325
,我应该得到浮点数八进制14.246
。 告诉我,我怎么能做到这一点? 提前致谢。
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
这是解决方案,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,如果您想要更少的八进制位(小数位,但为八进制),只需添加places
参数: print(FloatToOctal(12.325, 3))
返回14.246
,根据本网站是正确的: http : 14.246
/
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