On 2013-10-02,

(E-Mail Removed) <(E-Mail Removed)> wrote:

> 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:
I recommend using the builtin function round instead of

math.ceil. math.ceil doesn't do what is normally thought of as

rounding. In addition, it supports rounding to different numbers

of decimal places.

> def roundingVals_toTwoDeci():

> global y
You are hopefully* making modifications to y's object, but not rebinding y,

so you don't need this global statement.

> for d in y:

> for k, v in d.items():

> v = ceil(v*100)/100.0
[*] You're binding v to a new float object here, but not

modifying y. Thus, this code will have no effect on y.

You need to assign to y[k] here instead.

for k, v in d.items():

y[k] = round(v, 2)

> return
Bare returns are not usual at the end of Python functions. Just

let the function end; it returns None either way. Only return

when you've got an interesting value to return, or when you need

to end execution of the function early.

--

Neil Cerutti