Remove the first N items that match a condition in a Python list

Question

If I have a function matchCondition(x), how can I remove the first n items in a Python list that match that condition?

One solution is to itera

Answer 1

Straightforward Python:

N = 3
data = [1, 10, 2, 9, 3, 8, 4, 7]

def matchCondition(x):
    return x < 5

c = 1
l = []
for x in data:
    if c > N or not matchCondition(x):
        l.append(x)
    else:
        c += 1

print(l)

This can easily be turned into a generator if desired:

def filter_first(n, func, iterable):
    c = 1
    for x in iterable:
        if c > n or not func(x):
            yield x
        else:
            c += 1

print(list(filter_first(N, matchCondition, data)))