I have the following dictionary in Python:
dict_a = {"a": 3.55555, "b": 6.66666, "c": "foo"}
I would like to output it to a .json file with rounding up the floats up to 2 decimals:
with open('dict_a.txt', 'w') as json_file:
json.dump(dict_a , json_file)
output:
{"a": 3.55, "b": 6.66, "c": "foo"}
Is that possible using python 3.8 ?
A way to do this is by creating a new dictionary with the rounded values, you can do that in one line using dictionary comprehention while checking for non-float values as such:
Y = {k:(round(v,2) if isinstance(v,float) else v) for (k,v) in X.items()}
and then dump it. However a small note, do avoid using the word "dict" as your dictionary name, as its also a keyword in python (e.g. X = dict() is a method to create a new dictionary X). And its generally good practice to avoid those reserved keynames.
I do believe the above could could probably be optimised further (e.g, perhaps there is a function to either return the value for the round, or return a default value similar to the dictionary function get(), however I do not have any ideas on top of my mind.
Well,
Don't use var name dict as it's a safe word in python. use dct instead.
You can loop over your keys, vals and round them them to 2nd floating point. Full working example:
dct = {"a": 3.55555, "b": 6.66666}
for k, v in dct.items():
if type(v) is float:
dct[k] = round(v, 2)
with open('dict.txt', 'w') as json_file:
json.dump(dict, json_file)
