1

我想要做的是获得所有组合和每个组合的所有独特排列。与替换功能的组合只让我到目前为止:

from itertools import combinations_with_replacement as cwr
foo = list(cwr('ACGT', n)) ## n is an integer

我对如何前进的直觉是做这样的事情:

import numpy as np
from itertools import permutations as perm
bar = []
for x in foo:
    carp = list(perm(x))
    for i in range(len(carp)):
        for j in range(i+1,len(carp)):
             if carp[i] == carp[j]:
                 carp[j] = ''
    carp = carp[list(np.where(np.array(carp) != '')[0])]
    for y in carp:
        bar.append(y)
for i in range(len(bar)):
    for j in range(i+1,len(bar)):
         if bar[i] == bar[j]:
             bar[j] = ''
bar = [bar[x2] for x2 in list(np.where(np.array(bar) != '')[0])]

有没有更高效的算法?

4

1 回答 1

4

听起来您正在考虑一种“替换排列”,其中'AB'排列大小为 2 的输入将给出输出

AA
AB
BA
BB

如果是这样,那就是输入与自身时间的笛卡尔积。n你想要itertools.product

>>> import itertools
>>> list(itertools.product('AB', repeat=2))
[('A', 'A'), ('A', 'B'), ('B', 'A'), ('B', 'B')]
于 2013-07-28T20:22:11.780 回答