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class LengthError(BaseException):
pass
class MirrorError(BaseException):
pass
def raise_valueerror_if_data_is_not_lists_or_tuples(lists):
"""Check that `lists` is a list of lists: If not, raise an exception."""
def is_list_or_tuple(item):
return type(item) == type([]) or type(item) == type(tuple)
if (not is_list_or_tuple(lists)) or (not all(map(is_list_or_tuple, lists))):
raise ValueError("Expected list or tuple")
def raise_valueerror_if_lists_empty(lists):
"""Check that the list and its direct children are not empty."""
def empty(lst):
return len(lst) == 0
if (empty(lists)) or not all(map(lambda x: not empty(x), lists)):
raise ValueError("List/Tuple should NOT be empty!")
def nearest(lists, i, j):
raise_valueerror_if_data_is_not_lists_or_tuples(lists)
raise_valueerror_if_lists_empty(lists)
return None
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