def _partition(obj):
for s in flatten(obj):
head, sep, tail = s.partition(separator)
if normalize_head:
head = normalize_head(head)
if normalize_tail:
tail = normalize_tail(tail)
if sep:
yield (head, tail)
def test_flatten():
assert list(i.flatten([['a'], ['b']])) == ['a', 'b']
def test_flatten_nested():
assert list(i.flatten([['a'], ['b', 'c']])) == ['a', 'b', 'c']
def test_flatten_string():
# A string isn't considered iterable so nothing should happen
assert list(i.flatten('abc')) == ['abc']
def test_flatten_nested():
assert list(i.flatten([['a'], ['b', 'c']])) == ['a', 'b', 'c']
def test_flatten_string():
# A string isn't considered iterable so nothing should happen
assert list(i.flatten('abc')) == ['abc']
def test_flatten():
assert list(i.flatten([['a'], ['b']])) == ['a', 'b']
