Module pywander.list
Functions
def combine_odd_even(lst)
-
odd and even element do the add operation
def del_list(lst: list, indexs)
-
del list base a index list
>>> del_list([0,1,2,3,4,5],[2,3]) [0, 1, 4, 5] >>> lst = list(range(6)) >>> lst [0, 1, 2, 3, 4, 5] >>> del_list(lst,[2,3]) [0, 1, 4, 5] >>> lst [0, 1, 4, 5] >>> del_list(lst,[0,2]) [1, 5] >>> lst [1, 5]
def double_iter(lst: list, mode='combinations')
-
if the list is [A, B, C,D ] mode default value is combinations: which means no self-repeat and elements compare with no order. default mode will yield (A,B) (A,C) (A,D) (B,C) …
if set mode = product will yield which is equal two for-loop clause (A,A) (A,B) (A,C) (A,D) (B,A) (B,B) …
if set mode = permutations, will yield (A,B) (A,C) (A,D) (B,A) (B,C) (B,D) … which means no self-repeat and elements compare with order.
if set mode = combinations_with_replacement, will yield (A, A) (A, B) (A, C) (A, D) (B, B) (B, C) (B, D) … which means with self-repeat and elements compare with no order.
def group_list(lst: list, n=1)
-
group a list, in some case, it is maybe useful.
>>> list(group_list(list(range(10)),0)) Traceback (most recent call last): AssertionError >>> list(group_list(list(range(10)),1)) [[0], [1], [2], [3], [4], [5], [6], [7], [8], [9]] >>> list(group_list(list(range(10)),2)) [[0, 1], [2, 3], [4, 5], [6, 7], [8, 9]] >>> list(group_list(list(range(10)),3)) [[0, 1, 2], [3, 4, 5], [6, 7, 8], [9]] >>> list(group_list(list(range(10)),4)) [[0, 1, 2, 3], [4, 5, 6, 7], [8, 9]]