Return successive r-length combinations of elements in the iterable allowing individual elements to have successive repeats. combinations_with_replacement('ABC', 2) --> AA AB AC BB BC CC """def__init__(self, iterable, r):# real signature unknown; restored from __doc__
""" combinations_with_replacement(iterable, r) --> combinations_with_replacement object Return successive r-length combinations of elements in the iterable allowing individual elements to have successive repeats. combinations_with_replacement('ABC', 2) --> AA AB AC BB BC CC """ 把 it 产...
2 permutations() Returns successive permutations of elements in the iterable. 3 combinations() Returns successive combinations of elements from the iterable. 4 combinations_with_replacement() Returns combinations with replacement, allowing repeated elements in each combination.Print...
Python >>> combinations([1, 2, 3], 2) (1, 2), (1, 3), (2, 3) itertools.combinations_with_replacement Examplecombinations_with_replacement(iterable, n) Return successive n-length combinations of elements in the iterable allowing individual elements to have successive repeats....
itertools_combinations_with_replacement.py from itertools import * def show(iterable): first = None for i, item in enumerate(iterable, 1): if first != item[0]: if first is not None: print() first = item[0] print(''.join(item), end=' ') print() print('Unique pairs:\n') show...
combinations combinations_with_replacement cycle dropwhile enumerate filter filterfalse groupby imap permutations powerset reversed slice sliding_window sorted starmap takewhile unique_everseen (*only without custom hash and equality callables) unique_justseenI...
"Output from combinations_with_replacement: <itertools.combinations_with_replacement object at 0x10d87f7d0>\n", "Input: [1, 2, 3, 4, 5]\n", "Output: [(1, 1), (1, 2), (1, 3), (1, 4), (1, 5), (2, 2), (2, 3), (2, 4), (2, 5), (3, 3), (3, 4), (...
itertools模块提供的全部是处理迭代功能的函数,它们的返回值不是list,而是迭代对象,只有用for循环迭代的时候才真正计算 [TOC] 无限迭代器 count 返回一个无限迭代器 可以知道初始值和步长,as:count(2.5, 0.5) -> 2.5 3.0 3.5 ... demo defcount_demo():""" count(start=0, step=1) --> count object ...