{"id":1086602,"date":"2025-01-08T13:27:17","date_gmt":"2025-01-08T05:27:17","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1086602.html"},"modified":"2025-01-08T13:27:19","modified_gmt":"2025-01-08T05:27:19","slug":"python%e5%a6%82%e4%bd%95%e5%8e%bb%e9%99%a4%e5%88%97%e8%a1%a8%e4%b8%ad%e7%9a%84%e9%87%8d%e5%a4%8d%e9%a1%b9-2","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/1086602.html","title":{"rendered":"python\u5982\u4f55\u53bb\u9664\u5217\u8868\u4e2d\u7684\u91cd\u590d\u9879"},"content":{"rendered":"

\"python\u5982\u4f55\u53bb\u9664\u5217\u8868\u4e2d\u7684\u91cd\u590d\u9879\"<\/p>\n

\u8981\u53bb\u9664\u5217\u8868\u4e2d\u7684\u91cd\u590d\u9879\uff0c\u53ef\u4ee5\u4f7f\u7528\u96c6\u5408\u3001\u5b57\u5178\u6216\u4f7f\u7528\u5217\u8868\u89e3\u6790\u7b49\u65b9\u6cd5\u3002\u4f7f\u7528\u96c6\u5408\u662f\u6700\u5e38\u89c1\u7684\u65b9\u6cd5\uff0c\u56e0\u4e3a\u96c6\u5408\u81ea\u52a8\u53bb\u9664\u91cd\u590d\u9879\u3001\u4f7f\u7528\u5b57\u5178\u53ef\u4ee5\u4fdd\u6301\u5217\u8868\u7684\u987a\u5e8f\u3001\u5217\u8868\u89e3\u6790\u63d0\u4f9b\u4e86\u66f4\u591a\u7684\u7075\u6d3b\u6027\u3002\u4e0b\u9762\u8be6\u7ec6\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528\u96c6\u5408\u53bb\u91cd\u3002<\/strong><\/p>\n<\/p>\n

\u4f7f\u7528\u96c6\u5408\u53bb\u91cd\uff1a<\/strong><\/p>\n

\u96c6\u5408\uff08set\uff09\u662fPython\u4e2d\u4e00\u79cd\u6570\u636e\u7ed3\u6784\uff0c\u5b83\u4e0d\u5141\u8bb8\u6709\u91cd\u590d\u9879\u3002\u56e0\u6b64\uff0c\u53ef\u4ee5\u5c06\u5217\u8868\u8f6c\u6362\u4e3a\u96c6\u5408\u6765\u53bb\u91cd\uff0c\u7136\u540e\u518d\u5c06\u5176\u8f6c\u6362\u56de\u5217\u8868\u3002\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<\/p>\n

original_list = [1, 2, 2, 3, 4, 4, 5]<\/p>\n
unique_list = list(set(original_list))<\/p>\n
print(unique_list)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u79cd\u65b9\u6cd5\u975e\u5e38\u7b80\u6d01\uff0c\u4f46\u5b83\u4e0d\u80fd\u4fdd\u6301\u539f\u5217\u8868\u4e2d\u7684\u987a\u5e8f\u3002\u5982\u679c\u9700\u8981\u4fdd\u6301\u987a\u5e8f\uff0c\u53ef\u4ee5\u4f7f\u7528\u5176\u4ed6\u65b9\u6cd5\u3002<\/p>\n<\/p>\n
\n
\u4e00\u3001\u4f7f\u7528\u5b57\u5178\u53bb\u91cd<\/h2>\n<\/p>\n
\u5728Python 3.7\u53ca\u66f4\u9ad8\u7248\u672c\u4e2d\uff0c\u5b57\u5178\u4fdd\u6301\u63d2\u5165\u987a\u5e8f\u3002\u56e0\u6b64\uff0c\u53ef\u4ee5\u4f7f\u7528\u5b57\u5178\u6765\u53bb\u9664\u91cd\u590d\u9879\u5e76\u4fdd\u7559\u987a\u5e8f\u3002<\/p>\n<\/p>\n
original_list = [1, 2, 2, 3, 4, 4, 5]<\/p>\n
unique_list = list(dict.fromkeys(original_list))<\/p>\n
print(unique_list)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u6bb5\u4ee3\u7801\u9996\u5148\u5c06\u5217\u8868\u8f6c\u6362\u4e3a\u5b57\u5178\uff0c\u7136\u540e\u518d\u5c06\u5176\u8f6c\u6362\u56de\u5217\u8868\u3002\u5b57\u5178\u7684\u952e\u662f\u552f\u4e00\u7684\uff0c\u56e0\u6b64\u4f1a\u81ea\u52a8\u53bb\u9664\u91cd\u590d\u9879\uff0c\u5e76\u4e14\u4fdd\u6301\u539f\u6765\u7684\u63d2\u5165\u987a\u5e8f\u3002<\/p>\n<\/p>\n
\u4e8c\u3001\u4f7f\u7528\u5217\u8868\u89e3\u6790\u53bb\u91cd<\/h2>\n<\/p>\n
\u5217\u8868\u89e3\u6790\u63d0\u4f9b\u4e86\u7075\u6d3b\u6027\uff0c\u53ef\u4ee5\u5728\u751f\u6210\u65b0\u5217\u8868\u7684\u540c\u65f6\u53bb\u9664\u91cd\u590d\u9879\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528\u5217\u8868\u89e3\u6790\u53bb\u91cd\u7684\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
original_list = [1, 2, 2, 3, 4, 4, 5]<\/p>\n
seen = set()<\/p>\n
unique_list = [x for x in original_list if not (x in seen or seen.add(x))]<\/p>\n
print(unique_list)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u4e00\u4e2a\u96c6\u5408seen<\/code>\u6765\u8ddf\u8e2a\u5df2\u7ecf\u89c1\u8fc7\u7684\u5143\u7d20\u3002\u5217\u8868\u89e3\u6790\u4e2d\u7684\u6761\u4ef6\u68c0\u67e5x not in seen<\/code>\u786e\u4fdd\u53ea\u6709\u7b2c\u4e00\u6b21\u9047\u5230\u7684\u5143\u7d20\u4f1a\u88ab\u6dfb\u52a0\u5230\u65b0\u5217\u8868\u4e2d\u3002<\/p>\n<\/p>\n
\u4e09\u3001\u4f7f\u7528itertools\u5e93\u53bb\u91cd<\/h2>\n<\/p>\n
\u5982\u679c\u5217\u8868\u7684\u5143\u7d20\u4e0d\u53ef\u54c8\u5e0c\uff08\u4f8b\u5982\u5305\u542b\u5b50\u5217\u8868\uff09\uff0c\u53ef\u4ee5\u4f7f\u7528itertools<\/code>\u5e93\u4e2d\u7684groupby<\/code>\u51fd\u6570\u6765\u53bb\u9664\u91cd\u590d\u9879\u3002<\/p>\n<\/p>\n
from itertools import groupby<\/p>\n
original_list = [[1, 2], [1, 2], [3, 4]]<\/p>\n
unique_list = [key for key, _ in groupby(sorted(original_list))]<\/p>\n
print(unique_list)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u91cc\u5148\u5bf9\u5217\u8868\u8fdb\u884c\u6392\u5e8f\uff0c\u7136\u540e\u4f7f\u7528groupby<\/code>\u51fd\u6570\u6765\u5206\u7ec4\u5e76\u53bb\u9664\u91cd\u590d\u9879\u3002<\/p>\n<\/p>\n
\u56db\u3001\u624b\u52a8\u53bb\u91cd<\/h2>\n<\/p>\n
\u53ef\u4ee5\u901a\u8fc7\u624b\u52a8\u5faa\u73af\u548c\u6761\u4ef6\u68c0\u67e5\u6765\u53bb\u9664\u5217\u8868\u4e2d\u7684\u91cd\u590d\u9879\u3002\u8fd9\u79cd\u65b9\u6cd5\u867d\u7136\u4e0d\u5982\u524d\u9762\u7684\u65b9\u6cd5\u7b80\u6d01\uff0c\u4f46\u6709\u52a9\u4e8e\u7406\u89e3\u53bb\u91cd\u7684\u8fc7\u7a0b\u3002<\/p>\n<\/p>\n
original_list = [1, 2, 2, 3, 4, 4, 5]<\/p>\n
unique_list = []<\/p>\n
for item in original_list:<\/p>\n
    if item not in unique_list:<\/p>\n
        unique_list.append(item)<\/p>\n
print(unique_list)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u9010\u4e2a\u68c0\u67e5\u5217\u8868\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\uff0c\u5982\u679c\u5b83\u4e0d\u5728unique_list<\/code>\u4e2d\uff0c\u5c31\u5c06\u5176\u6dfb\u52a0\u8fdb\u53bb\u3002<\/p>\n<\/p>\n
\u4e94\u3001\u4f7f\u7528pandas\u5e93\u53bb\u91cd<\/h2>\n<\/p>\n
\u5982\u679c\u5904\u7406\u7684\u662f\u6570\u636e\u6846\u4e2d\u7684\u5217\uff0c\u53ef\u4ee5\u4f7f\u7528pandas<\/code>\u5e93\u6765\u53bb\u91cd\u3002<\/p>\n<\/p>\n
import pandas as pd<\/p>\n
original_list = [1, 2, 2, 3, 4, 4, 5]<\/p>\n
unique_list = pd.Series(original_list).drop_duplicates().tolist()<\/p>\n
print(unique_list)<\/p>\n
<\/code><\/pre>\n<\/p>\n
pandas<\/code>\u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u6570\u636e\u5904\u7406\u529f\u80fd\uff0cdrop_duplicates<\/code>\u51fd\u6570\u53ef\u4ee5\u65b9\u4fbf\u5730\u53bb\u9664\u91cd\u590d\u9879\u3002<\/p>\n<\/p>\n
\u516d\u3001\u6bd4\u8f83\u4e0d\u540c\u65b9\u6cd5\u7684\u6027\u80fd<\/h2>\n<\/p>\n
\u5728\u5904\u7406\u5927\u5217\u8868\u65f6\uff0c\u6027\u80fd\u662f\u4e00\u4e2a\u91cd\u8981\u7684\u8003\u8651\u56e0\u7d20\u3002\u4e0d\u540c\u7684\u65b9\u6cd5\u5728\u6027\u80fd\u4e0a\u4f1a\u6709\u6240\u4e0d\u540c\u3002\u53ef\u4ee5\u4f7f\u7528timeit<\/code>\u6a21\u5757\u6765\u6bd4\u8f83\u4e0d\u540c\u65b9\u6cd5\u7684\u6027\u80fd\u3002<\/p>\n<\/p>\n
import timeit<\/p>\n
original_list = [1, 2, 2, 3, 4, 4, 5] * 1000<\/p>\n
print(timeit.timeit(lambda: list(set(original_list)), number=1000))<\/p>\n
print(timeit.timeit(lambda: list(dict.fromkeys(original_list)), number=1000))<\/p>\n
print(timeit.timeit(lambda: [x for x in original_list if not (x in seen or seen.add(x))], number=1000))<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0c\u53ef\u4ee5\u6839\u636e\u5177\u4f53\u7684\u9700\u6c42\u9009\u62e9\u6027\u80fd\u6700\u4f18\u7684\u65b9\u6cd5\u3002<\/p>\n<\/p>\n
\u4e03\u3001\u6ce8\u610f\u4e8b\u9879<\/h2>\n<\/p>\n
    \n
  1. \u5143\u7d20\u7684\u53ef\u54c8\u5e0c\u6027<\/strong>\uff1a\u4f7f\u7528\u96c6\u5408\u548c\u5b57\u5178\u53bb\u91cd\u8981\u6c42\u5217\u8868\u4e2d\u7684\u5143\u7d20\u662f\u53ef\u54c8\u5e0c\u7684\u3002\u5982\u679c\u5143\u7d20\u662f\u4e0d\u53ef\u54c8\u5e0c\u7684\uff08\u4f8b\u5982\u5305\u542b\u5b50\u5217\u8868\uff09\uff0c\u9700\u8981\u4f7f\u7528\u5176\u4ed6\u65b9\u6cd5\u3002<\/li>\n
  2. \u987a\u5e8f\u7684\u4fdd\u6301<\/strong>\uff1a\u5982\u679c\u9700\u8981\u4fdd\u6301\u539f\u5217\u8868\u4e2d\u7684\u987a\u5e8f\uff0c\u5e94\u8be5\u9009\u62e9\u9002\u5f53\u7684\u65b9\u6cd5\uff0c\u4f8b\u5982\u4f7f\u7528dict.fromkeys<\/code>\u6216\u5217\u8868\u89e3\u6790\u3002<\/li>\n
  3. \u6027\u80fd<\/strong>\uff1a\u5728\u5904\u7406\u5927\u5217\u8868\u65f6\uff0c\u5e94\u8be5\u8003\u8651\u6027\u80fd\u56e0\u7d20\u3002\u4e0d\u540c\u7684\u65b9\u6cd5\u5728\u6027\u80fd\u4e0a\u53ef\u80fd\u4f1a\u6709\u663e\u8457\u5dee\u5f02\u3002<\/li>\n<\/ol>\n
    \n
    \u901a\u8fc7\u4ee5\u4e0a\u65b9\u6cd5\uff0c\u53ef\u4ee5\u6839\u636e\u5177\u4f53\u9700\u6c42\u9009\u62e9\u5408\u9002\u7684\u53bb\u91cd\u65b9\u6cd5\u3002\u65e0\u8bba\u662f\u8ffd\u6c42\u7b80\u6d01\u6027\u3001\u987a\u5e8f\u4fdd\u6301\u8fd8\u662f\u6027\u80fd\u4f18\u5316\uff0c\u90fd\u6709\u5bf9\u5e94\u7684\u65b9\u6cd5\u53ef\u4ee5\u4f7f\u7528\u3002\u5e0c\u671b\u8fd9\u4e9b\u5185\u5bb9\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff01<\/p>\n<\/p>\n
    \u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
     \u5982\u4f55\u4f7f\u7528Python\u53bb\u9664\u5217\u8868\u4e2d\u7684\u91cd\u590d\u9879\uff1f<\/strong>
    \u5728Python\u4e2d\uff0c\u6709\u591a\u79cd\u65b9\u6cd5\u53ef\u4ee5\u53bb\u9664\u5217\u8868\u4e2d\u7684\u91cd\u590d\u9879\u3002\u5e38\u89c1\u7684\u65b9\u6cd5\u5305\u62ec\u4f7f\u7528\u96c6\u5408\uff08set\uff09\u6765\u8fc7\u6ee4\u91cd\u590d\u5143\u7d20\uff0c\u6216\u8005\u4f7f\u7528\u5217\u8868\u63a8\u5bfc\u5f0f\u7ed3\u5408\u6761\u4ef6\u5224\u65ad\u6765\u4fdd\u7559\u552f\u4e00\u5143\u7d20\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u5c06\u5217\u8868\u8f6c\u6362\u4e3a\u96c6\u5408\uff0c\u7136\u540e\u518d\u8f6c\u6362\u56de\u5217\u8868\uff0c\u8fd9\u6837\u53ef\u4ee5\u76f4\u63a5\u53bb\u9664\u6240\u6709\u91cd\u590d\u9879\u3002\u4ee3\u7801\u793a\u4f8b\u5982\u4e0b\uff1a  <\/p>\n
    my_list = [1, 2, 2, 3, 4, 4, 5]\nunique_list = list(set(my_list))\nprint(unique_list)  # \u8f93\u51fa: [1, 2, 3, 4, 5]\n<\/code><\/pre>\n
    \u4f7f\u7528\u5b57\u5178\u5982\u4f55\u53bb\u9664\u5217\u8868\u4e2d\u7684\u91cd\u590d\u9879\uff1f<\/strong>
    \u5b57\u5178\u5728Python\u4e2d\u4e5f\u662f\u4e00\u4e2a\u975e\u5e38\u6709\u6548\u7684\u53bb\u91cd\u5de5\u5177\u3002\u5229\u7528\u5b57\u5178\u7684\u952e\u552f\u4e00\u6027\uff0c\u53ef\u4ee5\u901a\u8fc7\u5c06\u5217\u8868\u5143\u7d20\u4f5c\u4e3a\u5b57\u5178\u7684\u952e\u6765\u5b9e\u73b0\u53bb\u91cd\u3002\u793a\u4f8b\u5982\u4e0b\uff1a  <\/p>\n
    my_list = [1, 2, 2, 3, 4, 4, 5]\nunique_list = list(dict.fromkeys(my_list))\nprint(unique_list)  # \u8f93\u51fa: [1, 2, 3, 4, 5]\n<\/code><\/pre>\n
    \u8fd9\u79cd\u65b9\u6cd5\u4e0d\u4ec5\u53bb\u9664\u91cd\u590d\u9879\uff0c\u8fd8\u80fd\u4fdd\u6301\u539f\u59cb\u5143\u7d20\u7684\u987a\u5e8f\u3002<\/p>\n
    \u5728\u53bb\u9664\u91cd\u590d\u9879\u65f6\uff0c\u5982\u4f55\u4fdd\u6301\u5217\u8868\u7684\u987a\u5e8f\uff1f<\/strong>
    \u5982\u679c\u9700\u8981\u5728\u53bb\u91cd\u7684\u540c\u65f6\u4fdd\u6301\u539f\u59cb\u5217\u8868\u7684\u987a\u5e8f\uff0c\u53ef\u4ee5\u4f7f\u7528\u5217\u8868\u63a8\u5bfc\u5f0f\u7ed3\u5408\u96c6\u5408\u6765\u8fdb\u884c\u5904\u7406\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a  <\/p>\n
    my_list = [1, 2, 2, 3, 4, 4, 5]\nunique_list = []\n[unique_list.append(x) for x in my_list if x not in unique_list]\nprint(unique_list)  # \u8f93\u51fa: [1, 2, 3, 4, 5]\n<\/code><\/pre>\n
    \u8fd9\u79cd\u65b9\u6cd5\u786e\u4fdd\u4e86\u5143\u7d20\u7684\u987a\u5e8f\u4e0d\u4f1a\u6539\u53d8\uff0c\u540c\u65f6\u6709\u6548\u53bb\u9664\u4e86\u91cd\u590d\u9879\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u8981\u53bb\u9664\u5217\u8868\u4e2d\u7684\u91cd\u590d\u9879\uff0c\u53ef\u4ee5\u4f7f\u7528\u96c6\u5408\u3001\u5b57\u5178\u6216\u4f7f\u7528\u5217\u8868\u89e3\u6790\u7b49\u65b9\u6cd5\u3002\u4f7f\u7528\u96c6\u5408\u662f\u6700\u5e38\u89c1\u7684\u65b9\u6cd5\uff0c\u56e0\u4e3a\u96c6\u5408\u81ea\u52a8\u53bb\u9664\u91cd\u590d\u9879\u3001 […]","protected":false},"author":3,"featured_media":1086613,"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\/1086602"}],"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=1086602"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1086602\/revisions"}],"predecessor-version":[{"id":1086615,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1086602\/revisions\/1086615"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1086613"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1086602"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1086602"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1086602"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}