Drop Keys From Dictionary

[DreamingInsanity]

There's probably many ways of doing this, but personally I would use the filter() method:

ages = {"0.25": "a", "0.1":"b", "-0.03": "c", "-0.25": "d"}

def myFunc(x):
	if (not -0.1 <= float(x) <= 0.1):
		return x

ages = { k:ages[str(k)] for k in filter(myFunc, ages) }

Ages would then become: {'0.25': 'a', '-0.25': 'd'}
This could be compressed into 1 line if you wanted:

ages = { k:ages[str(k)] for k in filter(lambda x: not -0.1 <= float(x) <= 0.1, ages) }

EDIT: I read your post wrong. I didn't realise the floats were the the values and not the keys. Instead you can do this:

ages = {"1": "0.25", "2": "0.1", "3": "-0.03", "4": "-0.25"}
 
ages = { k:ages[str(k)] for k in filter(lambda x: not -0.1 <= float(ages[x]) <= 0.1, ages) }
print(ages)

which gets you:

Output:
{'1': '0.25', '4': '-0.25'}