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# mode: run
# tag: forin, control-flow, werror
def for_in_break(LL, p=bool):
"""
>>> for_in_break([[1,2,3], [4,5,6]])
True
>>> for_in_break([[1,2,3], [4,5,0]])
False
>>> for_in_break([[1,2,3], [0,4,5]])
False
>>> for_in_break([[1,2,3], [0,4,5], [6,7,8]])
False
>>> def collect(x):
... v.append(x)
... return x
>>> v = []
>>> for_in_break([[1,2,3], [4,5,6]], p=collect)
True
>>> v
[1, 2, 3, 4, 5, 6]
>>> v = []
>>> for_in_break([[1,2,3], [4,5,0]], p=collect)
False
>>> v
[1, 2, 3, 4, 5, 0]
>>> v = []
>>> for_in_break([[1,2,3], [0,4,5]], p=collect)
False
>>> v
[1, 2, 3, 0]
>>> v = []
>>> for_in_break([[1,2,3], [0,4,5], [6,7,8]], p=collect)
False
>>> v
[1, 2, 3, 0]
"""
result = 'NOK'
# implements the builtin all()
for L in LL:
for x in L:
if not p(x):
result = False
break
else:
continue
break
else:
result = True
return result
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