{"id":1149026,"date":"2025-01-13T16:44:36","date_gmt":"2025-01-13T08:44:36","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1149026.html"},"modified":"2025-01-13T16:44:39","modified_gmt":"2025-01-13T08:44:39","slug":"python-%e5%a6%82%e4%bd%95%e6%8e%92%e5%88%97%e7%bb%84%e5%90%88","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/1149026.html","title":{"rendered":"python \u5982\u4f55\u6392\u5217\u7ec4\u5408"},"content":{"rendered":"

\"python<\/p>\n

\u4e00\u3001Python\u6392\u5217\u7ec4\u5408\u7684\u65b9\u6cd5\u6709\uff1a\u4f7f\u7528itertools\u6a21\u5757\u3001\u9012\u5f52\u7b97\u6cd5\u3001\u751f\u6210\u5668\u51fd\u6570\u3002\u5176\u4e2d\u4f7f\u7528itertools\u6a21\u5757\u662f\u6700\u5e38\u89c1\u548c\u6700\u7b80\u5355\u7684\u65b9\u6cd5\u3002<\/strong> itertools\u6a21\u5757\u63d0\u4f9b\u4e86\u4e24\u4e2a\u51fd\u6570\uff1apermutations()\u548ccombinations()\uff0c\u5206\u522b\u7528\u4e8e\u751f\u6210\u6392\u5217\u548c\u7ec4\u5408\u3002permutations()\u51fd\u6570\u751f\u6210\u6240\u6709\u53ef\u80fd\u7684\u6392\u5217\uff0c\u800ccombinations()\u51fd\u6570\u751f\u6210\u6240\u6709\u53ef\u80fd\u7684\u7ec4\u5408\u3002\u4e0b\u9762\u5c06\u8be6\u7ec6\u8bb2\u89e3\u5982\u4f55\u4f7f\u7528itertools\u6a21\u5757\u8fdb\u884c\u6392\u5217\u7ec4\u5408\u3002<\/p>\n<\/p>\n

\u4f7f\u7528itertools\u6a21\u5757\u7684\u4f18\u52bf\u5728\u4e8e\u5b83\u662fPython\u6807\u51c6\u5e93\u7684\u4e00\u90e8\u5206\uff0c\u6613\u4e8e\u4f7f\u7528\u4e14\u6027\u80fd\u4f18\u8d8a\u3002<\/strong><\/p>\n<\/p>\n

\u4e8c\u3001itertools\u6a21\u5757\u7684\u4f7f\u7528<\/h3>\n<\/p>\n

1\u3001\u5bfc\u5165itertools\u6a21\u5757<\/h4>\n<\/p>\n

\u5728\u4f7f\u7528itertools\u6a21\u5757\u4e4b\u524d\uff0c\u9700\u8981\u5148\u5bfc\u5165\u8be5\u6a21\u5757\u3002\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u4ee3\u7801\u5bfc\u5165\uff1a<\/p>\n<\/p>\n

import itertools<\/p>\n
<\/code><\/pre>\n<\/p>\n
2\u3001\u4f7f\u7528permutations\u51fd\u6570\u751f\u6210\u6392\u5217<\/h4>\n<\/p>\n
permutations\u51fd\u6570\u7528\u4e8e\u751f\u6210\u7ed9\u5b9a\u5e8f\u5217\u7684\u6240\u6709\u53ef\u80fd\u6392\u5217\u3002\u51fd\u6570\u7684\u57fa\u672c\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<\/p>\n
itertools.permutations(iterable, r=None)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5176\u4e2d\uff0citerable\u662f\u4e00\u4e2a\u53ef\u8fed\u4ee3\u5bf9\u8c61\uff0cr\u662f\u6392\u5217\u7684\u957f\u5ea6\u3002\u5982\u679c\u672a\u6307\u5b9ar\uff0c\u5219\u9ed8\u8ba4\u4e3aiterable\u7684\u957f\u5ea6\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
import itertools<\/p>\n
data = [1, 2, 3]<\/p>\n
result = list(itertools.permutations(data))<\/p>\n
print(result)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8f93\u51fa\uff1a<\/p>\n<\/p>\n
[(1, 2, 3), (1, 3, 2), (2, 1, 3), (2, 3, 1), (3, 1, 2), (3, 2, 1)]<\/p>\n
<\/code><\/pre>\n<\/p>\n
3\u3001\u4f7f\u7528combinations\u51fd\u6570\u751f\u6210\u7ec4\u5408<\/h4>\n<\/p>\n
combinations\u51fd\u6570\u7528\u4e8e\u751f\u6210\u7ed9\u5b9a\u5e8f\u5217\u7684\u6240\u6709\u53ef\u80fd\u7ec4\u5408\u3002\u51fd\u6570\u7684\u57fa\u672c\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<\/p>\n
itertools.combinations(iterable, r)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5176\u4e2d\uff0citerable\u662f\u4e00\u4e2a\u53ef\u8fed\u4ee3\u5bf9\u8c61\uff0cr\u662f\u7ec4\u5408\u7684\u957f\u5ea6\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
import itertools<\/p>\n
data = [1, 2, 3]<\/p>\n
result = list(itertools.combinations(data, 2))<\/p>\n
print(result)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8f93\u51fa\uff1a<\/p>\n<\/p>\n
[(1, 2), (1, 3), (2, 3)]<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e09\u3001\u9012\u5f52\u7b97\u6cd5\u751f\u6210\u6392\u5217\u7ec4\u5408<\/h3>\n<\/p>\n
1\u3001\u9012\u5f52\u751f\u6210\u6392\u5217<\/h4>\n<\/p>\n
\u9012\u5f52\u7b97\u6cd5\u662f\u4e00\u79cd\u5e38\u89c1\u7684\u89e3\u51b3\u6392\u5217\u95ee\u9898\u7684\u65b9\u6cd5\u3002\u9012\u5f52\u751f\u6210\u6392\u5217\u7684\u57fa\u672c\u601d\u8def\u662f\uff1a\u5bf9\u4e8e\u6bcf\u4e2a\u5143\u7d20\uff0c\u5c06\u5176\u4e0e\u5269\u4f59\u5143\u7d20\u7684\u6392\u5217\u7ec4\u5408\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
def permutations(data):<\/p>\n
    if len(data) == 1:<\/p>\n
        return [data]<\/p>\n
    perm = []<\/p>\n
    for i in range(len(data)):<\/p>\n
        m = data[i]<\/p>\n
        rem_data = data[:i] + data[i+1:]<\/p>\n
        for p in permutations(rem_data):<\/p>\n
            perm.append([m] + p)<\/p>\n
    return perm<\/p>\n
data = [1, 2, 3]<\/p>\n
result = permutations(data)<\/p>\n
print(result)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8f93\u51fa\uff1a<\/p>\n<\/p>\n
[[1, 2, 3], [1, 3, 2], [2, 1, 3], [2, 3, 1], [3, 1, 2], [3, 2, 1]]<\/p>\n
<\/code><\/pre>\n<\/p>\n
2\u3001\u9012\u5f52\u751f\u6210\u7ec4\u5408<\/h4>\n<\/p>\n
\u9012\u5f52\u7b97\u6cd5\u4e5f\u53ef\u4ee5\u7528\u4e8e\u751f\u6210\u7ec4\u5408\u3002\u9012\u5f52\u751f\u6210\u7ec4\u5408\u7684\u57fa\u672c\u601d\u8def\u662f\uff1a\u5bf9\u4e8e\u6bcf\u4e2a\u5143\u7d20\uff0c\u751f\u6210\u5305\u542b\u8be5\u5143\u7d20\u548c\u4e0d\u5305\u542b\u8be5\u5143\u7d20\u7684\u7ec4\u5408\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
def combinations(data, r):<\/p>\n
    if r == 0:<\/p>\n
        return [[]]<\/p>\n
    if len(data) == 0:<\/p>\n
        return []<\/p>\n
    comb = []<\/p>\n
    for i in range(len(data)):<\/p>\n
        m = data[i]<\/p>\n
        rem_data = data[i+1:]<\/p>\n
        for c in combinations(rem_data, r-1):<\/p>\n
            comb.append([m] + c)<\/p>\n
    return comb<\/p>\n
data = [1, 2, 3]<\/p>\n
result = combinations(data, 2)<\/p>\n
print(result)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8f93\u51fa\uff1a<\/p>\n<\/p>\n
[[1, 2], [1, 3], [2, 3]]<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u56db\u3001\u751f\u6210\u5668\u51fd\u6570\u751f\u6210\u6392\u5217\u7ec4\u5408<\/h3>\n<\/p>\n
1\u3001\u751f\u6210\u5668\u51fd\u6570\u751f\u6210\u6392\u5217<\/h4>\n<\/p>\n
\u751f\u6210\u5668\u51fd\u6570\u662f\u4e00\u79cd\u9ad8\u6548\u7684\u751f\u6210\u6392\u5217\u7684\u65b9\u6cd5\u3002\u751f\u6210\u5668\u51fd\u6570\u901a\u8fc7\u4f7f\u7528yield\u5173\u952e\u5b57\u8fd4\u56de\u751f\u6210\u7684\u6392\u5217\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
def permutations(data):<\/p>\n
    if len(data) == 1:<\/p>\n
        yield data<\/p>\n
    else:<\/p>\n
        for i in range(len(data)):<\/p>\n
            m = data[i]<\/p>\n
            rem_data = data[:i] + data[i+1:]<\/p>\n
            for p in permutations(rem_data):<\/p>\n
                yield [m] + p<\/p>\n
data = [1, 2, 3]<\/p>\n
result = list(permutations(data))<\/p>\n
print(result)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8f93\u51fa\uff1a<\/p>\n<\/p>\n
[[1, 2, 3], [1, 3, 2], [2, 1, 3], [2, 3, 1], [3, 1, 2], [3, 2, 1]]<\/p>\n
<\/code><\/pre>\n<\/p>\n
2\u3001\u751f\u6210\u5668\u51fd\u6570\u751f\u6210\u7ec4\u5408<\/h4>\n<\/p>\n
\u751f\u6210\u5668\u51fd\u6570\u4e5f\u53ef\u4ee5\u7528\u4e8e\u751f\u6210\u7ec4\u5408\u3002\u751f\u6210\u5668\u51fd\u6570\u901a\u8fc7\u4f7f\u7528yield\u5173\u952e\u5b57\u8fd4\u56de\u751f\u6210\u7684\u7ec4\u5408\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
def combinations(data, r):<\/p>\n
    if r == 0:<\/p>\n
        yield []<\/p>\n
    elif len(data) == 0:<\/p>\n
        return<\/p>\n
    else:<\/p>\n
        for i in range(len(data)):<\/p>\n
            m = data[i]<\/p>\n
            rem_data = data[i+1:]<\/p>\n
            for c in combinations(rem_data, r-1):<\/p>\n
                yield [m] + c<\/p>\n
data = [1, 2, 3]<\/p>\n
result = list(combinations(data, 2))<\/p>\n
print(result)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8f93\u51fa\uff1a<\/p>\n<\/p>\n
[[1, 2], [1, 3], [2, 3]]<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e94\u3001\u6027\u80fd\u6bd4\u8f83<\/h3>\n<\/p>\n
\u5bf9\u4e8e\u4e0d\u540c\u7684\u65b9\u6cd5\uff0c\u6027\u80fd\u8868\u73b0\u4f1a\u6709\u6240\u4e0d\u540c\u3002\u4e00\u822c\u6765\u8bf4\uff0citertools\u6a21\u5757\u7684\u6027\u80fd\u4f18\u8d8a\uff0c\u9002\u7528\u4e8e\u5927\u591a\u6570\u573a\u666f\u3002\u9012\u5f52\u7b97\u6cd5\u867d\u7136\u76f4\u89c2\uff0c\u4f46\u5bf9\u4e8e\u5927\u89c4\u6a21\u6570\u636e\uff0c\u6027\u80fd\u8868\u73b0\u4e0d\u4f73\u3002\u751f\u6210\u5668\u51fd\u6570\u5728\u5185\u5b58\u4f7f\u7528\u4e0a\u8868\u73b0\u4f18\u8d8a\uff0c\u9002\u5408\u5904\u7406\u5927\u89c4\u6a21\u6570\u636e\u3002<\/p>\n<\/p>\n
1\u3001itertools\u6a21\u5757\u7684\u6027\u80fd<\/h4>\n<\/p>\n
itertools\u6a21\u5757\u662fPython\u6807\u51c6\u5e93\u7684\u4e00\u90e8\u5206\uff0c\u7ecf\u8fc7\u9ad8\u5ea6\u4f18\u5316\uff0c\u9002\u5408\u5904\u7406\u5927\u89c4\u6a21\u6570\u636e\u3002\u5bf9\u4e8e\u5e38\u89c1\u7684\u6392\u5217\u7ec4\u5408\u95ee\u9898\uff0citertools\u6a21\u5757\u662f\u63a8\u8350\u7684\u9009\u62e9\u3002<\/p>\n<\/p>\n
2\u3001\u9012\u5f52\u7b97\u6cd5\u7684\u6027\u80fd<\/h4>\n<\/p>\n
\u9012\u5f52\u7b97\u6cd5\u7684\u6027\u80fd\u53d7\u9650\u4e8e\u9012\u5f52\u6df1\u5ea6\uff0c\u5bf9\u4e8e\u5927\u89c4\u6a21\u6570\u636e\uff0c\u5bb9\u6613\u5bfc\u81f4\u9012\u5f52\u6df1\u5ea6\u8d85\u9650\u3002\u9664\u975e\u6570\u636e\u89c4\u6a21\u8f83\u5c0f\uff0c\u5426\u5219\u4e0d\u63a8\u8350\u4f7f\u7528\u9012\u5f52\u7b97\u6cd5\u3002<\/p>\n<\/p>\n
3\u3001\u751f\u6210\u5668\u51fd\u6570\u7684\u6027\u80fd<\/h4>\n<\/p>\n
\u751f\u6210\u5668\u51fd\u6570\u901a\u8fc7\u60f0\u6027\u6c42\u503c\uff0c\u907f\u514d\u4e86\u5927\u91cf\u7684\u5185\u5b58\u4f7f\u7528\u3002\u5bf9\u4e8e\u5927\u89c4\u6a21\u6570\u636e\uff0c\u751f\u6210\u5668\u51fd\u6570\u8868\u73b0\u4f18\u8d8a\u3002\u4e0d\u8fc7\uff0c\u751f\u6210\u5668\u51fd\u6570\u7684\u5b9e\u73b0\u8f83\u4e3a\u590d\u6742\uff0c\u9700\u8981\u4e00\u5b9a\u7684\u7f16\u7a0b\u7ecf\u9a8c\u3002<\/p>\n<\/p>\n
\u516d\u3001\u5b9e\u9645\u5e94\u7528<\/h3>\n<\/p>\n
\u6392\u5217\u7ec4\u5408\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u6709\u5e7f\u6cdb\u7684\u5e94\u7528\u3002\u4f8b\u5982\uff0c\u5bc6\u7801\u7834\u89e3\u3001\u8def\u5f84\u89c4\u5212\u3001\u8d44\u6e90\u5206\u914d\u7b49\u95ee\u9898\u4e2d\uff0c\u6392\u5217\u7ec4\u5408\u7b97\u6cd5\u90fd\u80fd\u53d1\u6325\u91cd\u8981\u4f5c\u7528\u3002\u4e0b\u9762\u5217\u4e3e\u51e0\u4e2a\u5b9e\u9645\u5e94\u7528\u7684\u793a\u4f8b\u3002<\/p>\n<\/p>\n
1\u3001\u5bc6\u7801\u7834\u89e3<\/h4>\n<\/p>\n
\u5728\u5bc6\u7801\u7834\u89e3\u4e2d\uff0c\u6392\u5217\u7ec4\u5408\u7b97\u6cd5\u53ef\u4ee5\u7528\u4e8e\u751f\u6210\u6240\u6709\u53ef\u80fd\u7684\u5bc6\u7801\u7ec4\u5408\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
import itertools<\/p>\n
charset = 'abc123'<\/p>\n
length = 3<\/p>\n
result = list(itertools.product(charset, repeat=length))<\/p>\n
print(result)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8f93\u51fa\uff1a<\/p>\n<\/p>\n
[('a', 'a', 'a'), ('a', 'a', 'b'), ('a', 'a', 'c'), ...]<\/p>\n
<\/code><\/pre>\n<\/p>\n
2\u3001\u8def\u5f84\u89c4\u5212<\/h4>\n<\/p>\n
\u5728\u8def\u5f84\u89c4\u5212\u4e2d\uff0c\u6392\u5217\u7ec4\u5408\u7b97\u6cd5\u53ef\u4ee5\u7528\u4e8e\u751f\u6210\u6240\u6709\u53ef\u80fd\u7684\u8def\u5f84\u7ec4\u5408\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
import itertools<\/p>\n
cities = ['A', 'B', 'C']<\/p>\n
result = list(itertools.permutations(cities))<\/p>\n
print(result)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8f93\u51fa\uff1a<\/p>\n<\/p>\n
[('A', 'B', 'C'), ('A', 'C', 'B'), ('B', 'A', 'C'), ...]<\/p>\n
<\/code><\/pre>\n<\/p>\n
3\u3001\u8d44\u6e90\u5206\u914d<\/h4>\n<\/p>\n
\u5728\u8d44\u6e90\u5206\u914d\u4e2d\uff0c\u6392\u5217\u7ec4\u5408\u7b97\u6cd5\u53ef\u4ee5\u7528\u4e8e\u751f\u6210\u6240\u6709\u53ef\u80fd\u7684\u8d44\u6e90\u5206\u914d\u65b9\u6848\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
import itertools<\/p>\n
resources = ['R1', 'R2', 'R3']<\/p>\n
tasks = ['T1', 'T2']<\/p>\n
result = list(itertools.product(resources, tasks))<\/p>\n
print(result)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8f93\u51fa\uff1a<\/p>\n<\/p>\n
[('R1', 'T1'), ('R1', 'T2'), ('R2', 'T1'), ...]<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e03\u3001\u603b\u7ed3<\/h3>\n<\/p>\n
\u901a\u8fc7\u672c\u6587\u7684\u4ecb\u7ecd\uff0c\u76f8\u4fe1\u4f60\u5df2\u7ecf\u638c\u63e1\u4e86Python\u4e2d\u6392\u5217\u7ec4\u5408\u7684\u591a\u79cd\u65b9\u6cd5\u3002itertools\u6a21\u5757\u63d0\u4f9b\u4e86\u7b80\u5355\u9ad8\u6548\u7684\u6392\u5217\u7ec4\u5408\u751f\u6210\u51fd\u6570\uff0c\u9002\u5408\u5927\u591a\u6570\u573a\u666f\u3002\u9012\u5f52\u7b97\u6cd5\u9002\u5408\u5c0f\u89c4\u6a21\u6570\u636e\uff0c\u4f46\u6027\u80fd\u53d7\u9650\u3002\u751f\u6210\u5668\u51fd\u6570\u5728\u5185\u5b58\u4f7f\u7528\u4e0a\u8868\u73b0\u4f18\u8d8a\uff0c\u9002\u5408\u5904\u7406\u5927\u89c4\u6a21\u6570\u636e\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u6392\u5217\u7ec4\u5408\u7b97\u6cd5\u6709\u5e7f\u6cdb\u7684\u5e94\u7528\uff0c\u4f8b\u5982\u5bc6\u7801\u7834\u89e3\u3001\u8def\u5f84\u89c4\u5212\u3001\u8d44\u6e90\u5206\u914d\u7b49\u3002\u5e0c\u671b\u672c\u6587\u80fd\u5e2e\u52a9\u4f60\u66f4\u597d\u5730\u7406\u89e3\u548c\u5e94\u7528Python\u4e2d\u7684\u6392\u5217\u7ec4\u5408\u7b97\u6cd5\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
 \u5982\u4f55\u5728Python\u4e2d\u751f\u6210\u6240\u6709\u53ef\u80fd\u7684\u6392\u5217\uff1f<\/strong>
\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528itertools<\/code>\u6a21\u5757\u4e2d\u7684permutations<\/code>\u51fd\u6570\u6765\u751f\u6210\u6240\u6709\u53ef\u80fd\u7684\u6392\u5217\u3002\u4f8b\u5982\uff0c\u5982\u679c\u4f60\u60f3\u751f\u6210\u5b57\u7b26\u4e32\u201cABC\u201d\u7684\u6240\u6709\u6392\u5217\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a  <\/p>\n
import itertools\n\nperms = itertools.permutations('ABC')\nfor perm in perms:\n    print(''.join(perm))\n<\/code><\/pre>\n
\u8fd9\u6bb5\u4ee3\u7801\u5c06\u8f93\u51fa\u6240\u6709\u53ef\u80fd\u7684\u6392\u5217\u7ec4\u5408\uff0c\u5982\u201cABC\u201d\u3001\u201cACB\u201d\u3001\u201cBAC\u201d\u7b49\u3002<\/p>\n
Python\u4e2d\u5982\u4f55\u8fdb\u884c\u7ec4\u5408\u7684\u751f\u6210\uff1f<\/strong>
\u7ec4\u5408\u7684\u751f\u6210\u53ef\u4ee5\u901a\u8fc7itertools<\/code>\u6a21\u5757\u4e2d\u7684combinations<\/code>\u51fd\u6570\u5b9e\u73b0\u3002\u5047\u8bbe\u4f60\u60f3\u4ece\u5217\u8868[1, 2, 3, 4]<\/code>\u4e2d\u9009\u62e9\u4e24\u4e2a\u5143\u7d20\u7684\u7ec4\u5408\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a  <\/p>\n
import itertools\n\ncombos = itertools.combinations([1, 2, 3, 4], 2)\nfor combo in combos:\n    print(combo)\n<\/code><\/pre>\n
\u8fd0\u884c\u6b64\u4ee3\u7801\u5c06\u8f93\u51fa\u6240\u6709\u53ef\u80fd\u7684\u7ec4\u5408\uff0c\u5982(1, 2)<\/code>\u3001(1, 3)<\/code>\u3001(2, 3)<\/code>\u7b49\u3002<\/p>\n
\u5982\u4f55\u5728Python\u4e2d\u5904\u7406\u91cd\u590d\u5143\u7d20\u7684\u6392\u5217\u548c\u7ec4\u5408\uff1f<\/strong>
\u5bf9\u4e8e\u5305\u542b\u91cd\u590d\u5143\u7d20\u7684\u60c5\u51b5\uff0citertools<\/code>\u6a21\u5757\u63d0\u4f9b\u4e86permutations<\/code>\u548ccombinations<\/code>\u7684\u53d8\u79cd\uff0c\u5206\u522b\u662fmultiset_permutations<\/code>\u548ccombinations_with_replacement<\/code>\u3002\u5904\u7406\u91cd\u590d\u5143\u7d20\u7684\u6392\u5217\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528collections.Counter<\/code>\u6765\u8ba1\u7b97\u5143\u7d20\u7684\u9891\u7387\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\uff1a  <\/p>\n
from itertools import permutations\nfrom collections import Counter\n\nelements = ['A', 'A', 'B']\nperms = set(permutations(elements))\nfor perm in perms:\n    print(''.join(perm))\n<\/code><\/pre>\n
\u5bf9\u4e8e\u7ec4\u5408\uff0c\u53ef\u4ee5\u4f7f\u7528combinations_with_replacement<\/code>\u6765\u751f\u6210\u5141\u8bb8\u91cd\u590d\u9009\u62e9\u7684\u7ec4\u5408\u3002\u5177\u4f53\u4ee3\u7801\u5982\u4e0b\uff1a  <\/p>\n
import itertools\n\ncombos = itertools.combinations_with_replacement([1, 2], 2)\nfor combo in combos:\n    print(combo)\n<\/code><\/pre>\n
\u8fd9\u5c06\u8f93\u51fa(1, 1)<\/code>\u3001(1, 2)<\/code>\u548c(2, 2)<\/code>\u7b49\u7ec4\u5408\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u4e00\u3001Python\u6392\u5217\u7ec4\u5408\u7684\u65b9\u6cd5\u6709\uff1a\u4f7f\u7528itertools\u6a21\u5757\u3001\u9012\u5f52\u7b97\u6cd5\u3001\u751f\u6210\u5668\u51fd\u6570\u3002\u5176\u4e2d\u4f7f\u7528itertools […]","protected":false},"author":3,"featured_media":1149033,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1149026"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=1149026"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1149026\/revisions"}],"predecessor-version":[{"id":1149036,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1149026\/revisions\/1149036"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1149033"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1149026"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1149026"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1149026"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}