嵌套的Python列表理解，在第一个唯一时中断

Question

Looking for a way to put this logic into a list comprehension:

new_bills = []
for bill in bills:
    for gnr in bill["gnrs"]:
        if timestart <= gnr["date"] <= timeend:
            new_bills.append(bill)
            break
return new_bills

So, these are two nested dictionaries, and I only want the first instance of "bill" that fits the filter.

I used to have this:

return [bill for bill in bills for gnr in bill["gnrs"] if timestart <= gnr["date"] <= timeend]

However, this duped the bill object for everytime the if clause was met. Is there a way to get a list comprehension to behave like the for loop above? Keep in mind sets are out, as the bill is a dictionary (unhashable).

Edit for duplicate answer popup thing: The Solution turned out to be entirely different.

Answer 1

Your inner loop is part of the filter:

new_bills = [
    bill for bill in bills
    if any(timestart <= gnr["date"] <= timeend for gnr in bill["gnrs"])
]