Merges two or more lists into a list of lists, combining elements from each of the input lists based on their positions.
max()combined with a list comprehension to get the length of the longest list in the arguments.
range()in combination with the
max_lengthvariable to loop as many times as there are elements in the longest list.
- If a list is shorter than
fill_valuefor the remaining items (defaults to
itertools.zip_longest()provide similar functionality to this snippet.
def merge(*args, fill_value = None): max_length = max([len(lst) for lst in args]) result =  for i in range(max_length): result.append([ args[k][i] if i < len(args[k]) else fill_value for k in range(len(args)) ]) return result
merge(['a', 'b'], [1, 2], [True, False]) # [['a', 1, True], ['b', 2, False]] merge(['a'], [1, 2], [True, False]) # [['a', 1, True], [None, 2, False]] merge(['a'], [1, 2], [True, False], fill_value = '_') # [['a', 1, True], ['_', 2, False]]
Groups the elements of a list based on the given function and returns the count of elements in each group.
Returns the difference between two lists, after applying the provided function to each list element of both.
Returns the symmetric difference between two lists, after applying the provided function to each list element of both.