Python: create sublist by condition (Split a Python list into a list of lists where the lists are split around elements matching a certain criteria)

yield_subgroups.py

from itertools import islice, zip_longest

def yield_subgroups(group, subgroup_test):
    subgroup = []

    for i, j in zip_longest(group, islice(group, 1, None)):
        if subgroup_test(i, j):
            yield subgroup
            subgroup = []
        else:
            subgroup.append(i)

    yield subgroup

num_list = [97, 122, 99, "", 98, 111, 112, "", 113, 100, 102]

res = list(yield_subgroups(num_list, lambda i, j: i == ""))
print(res)  # [[97, 122, 99], [98, 111, 112], [113, 100, 102]]