Python-将量值向上舍入为整数的最佳方法是什么

Question

I have a floating point number which I would like to round to an integer, but always round up (where 'up' means larger in magnitude)

For example, 4.2 would be rounded to 5, and -4.2 would be rounded to -5.0

Is there a nice way to do this that is built into Python? If not, what would you recommend as the most efficient way of performing this operation?

Originally I was just using math.ceil() , until I realized math.ceil(4.2) gives 5, while math.ceil(-4.2) gives -4, which is not what I want.

One way that to get around this is to use ceil for positive numbers, and floor for the negative ones, but the code starts to look really gross with inline if statements everywhere (I use this operation in multiple places)

Another possibility might be something like math.copysign( math.ceil( abs( x ) ), x ) which also seems a little excessive

Answer 1

but the code starts to look really gross with inline if statements everywhere (I use this operation in multiple places)

Then write a function:

def myround(flt):
   return math.ceil(flt) if flt > 0.0 else math.floor(flt)

Answer 2

If you don't want to scatter "inline if statements everywhere", you could defined your own function:

def my_rounding(x):
    return math.ceil(x) if x > 0. else math.floor(x)

:D