trip...@gmail.com writes:
> am trying to round off values in a dict to 2 decimal points but
> have been unsuccessful so far. The input I have is like this:
>
> y = [{'a': 80.0, 'b': 0.0786235, 'c': 10.0, 'd': 10.6742903},
> {'a': 80.73246, 'b': 0.0, 'c': 10.780323, 'd': 10.0}, {'a':
> 80.7239, 'b': 0.7823640, 'c': 10.0, 'd': 10.0}, {'a':
> 80.7802313217234, 'b': 0.0, 'c': 10.0, 'd': 10.9762304}]
>
> I want to round off all the values to two decimal points using the
> ceil function. Here's what I have:
>
> def roundingVals_toTwoDeci():
> global y
> for d in y:
> for k, v in d.items():
> v = ceil(v*100)/100.0
> return
> roundingVals_toTwoDeci()
>
> But it is not working - I am still getting the old values.
You are assigning to a local variable, v. Instead, store the new
values back to the dict like this:
d[k] = ceil(v*100)/100.0
And you don't need to declare y global. It would only be needed if you
assigned directly to it, as in y = ... (usually not a good idea).
The rounding may not work the way you expect, because float values are
stored in binary. You may need a decimal type, or you may need to
format the output when printing instead.
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