{"id":1106017,"date":"2025-01-08T16:36:14","date_gmt":"2025-01-08T08:36:14","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1106017.html"},"modified":"2025-01-08T16:36:14","modified_gmt":"2025-01-08T08:36:14","slug":"python%e5%a6%82%e4%bd%95%e4%b8%8d%e5%8f%96%e5%88%97%e8%a1%a8%e4%b8%ad%e9%87%8d%e5%a4%8d%e5%80%bc%e5%be%aa%e7%8e%af","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1106017.html","title":{"rendered":"python\u5982\u4f55\u4e0d\u53d6\u5217\u8868\u4e2d\u91cd\u590d\u503c\u5faa\u73af"},"content":{"rendered":"

\"python\u5982\u4f55\u4e0d\u53d6\u5217\u8868\u4e2d\u91cd\u590d\u503c\u5faa\u73af\"<\/p>\n

\u5728Python\u4e2d\u901a\u8fc7\u4e0d\u53d6\u5217\u8868\u4e2d\u7684\u91cd\u590d\u503c\u6765\u8fdb\u884c\u5faa\u73af\uff0c\u53ef\u4ee5\u4f7f\u7528\u96c6\u5408\uff08set\uff09\u6570\u636e\u7ed3\u6784\u3001\u5b57\u5178\uff08dictionary\uff09\u6765\u5b9e\u73b0<\/strong>\u3002\u96c6\u5408\u548c\u5b57\u5178\u7684\u6570\u636e\u7ed3\u6784\u5177\u6709\u53bb\u91cd\u7279\u6027\uff0c\u53ef\u4ee5\u5f88\u65b9\u4fbf\u5730\u53bb\u9664\u5217\u8868\u4e2d\u7684\u91cd\u590d\u503c\u3002\u4e0b\u9762\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u51e0\u79cd\u65b9\u6cd5\uff0c\u5e76\u4ece\u591a\u4e2a\u89d2\u5ea6\u8fdb\u884c\u8be6\u7ec6\u7684\u63cf\u8ff0\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u4f7f\u7528\u96c6\u5408\uff08set\uff09\u53bb\u91cd<\/h3>\n<\/p>\n

\u96c6\u5408\u662f\u4e00\u79cd\u65e0\u5e8f\u4e14\u4e0d\u91cd\u590d\u7684\u5143\u7d20\u96c6\u5408\uff0c\u56e0\u6b64\u53ef\u4ee5\u5229\u7528\u96c6\u5408\u7684\u7279\u6027\u53bb\u9664\u5217\u8868\u4e2d\u7684\u91cd\u590d\u503c\u3002<\/p>\n<\/p>\n

1.1 \u8f6c\u6362\u5217\u8868\u4e3a\u96c6\u5408<\/h4>\n<\/p>\n

\u5c06\u5217\u8868\u8f6c\u6362\u4e3a\u96c6\u5408\uff0c\u7136\u540e\u5bf9\u96c6\u5408\u8fdb\u884c\u5faa\u73af\u64cd\u4f5c\uff1a<\/p>\n<\/p>\n

my_list = [1, 2, 2, 3, 4, 4, 5]<\/p>\n
unique_set = set(my_list)<\/p>\n
for item in unique_set:<\/p>\n
    print(item)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cset(my_list)<\/code>\u4f1a\u5c06\u5217\u8868\u8f6c\u6362\u4e3a\u96c6\u5408\uff0c\u4ece\u800c\u81ea\u52a8\u53bb\u9664\u91cd\u590d\u503c\u3002\u7136\u540e\u5bf9\u96c6\u5408\u4e2d\u7684\u5143\u7d20\u8fdb\u884c\u5faa\u73af\u64cd\u4f5c\u3002<\/p>\n<\/p>\n
1.2 \u518d\u8f6c\u6362\u56de\u5217\u8868<\/h4>\n<\/p>\n
\u5982\u679c\u9700\u8981\u4fdd\u6301\u539f\u5217\u8868\u7684\u987a\u5e8f\uff0c\u53ef\u4ee5\u5148\u5c06\u5217\u8868\u8f6c\u6362\u4e3a\u96c6\u5408\u53bb\u91cd\uff0c\u518d\u8f6c\u6362\u56de\u5217\u8868\u8fdb\u884c\u5faa\u73af\uff1a<\/p>\n<\/p>\n
my_list = [1, 2, 2, 3, 4, 4, 5]<\/p>\n
unique_list = list(set(my_list))<\/p>\n
for item in unique_list:<\/p>\n
    print(item)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u867d\u7136\u96c6\u5408\u662f\u65e0\u5e8f\u7684\uff0c\u4f46\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u8fd9\u6837\u7684\u64cd\u4f5c\u8db3\u591f\u6ee1\u8db3\u9700\u6c42\u3002\u5982\u679c\u987a\u5e8f\u5f88\u91cd\u8981\uff0c\u5efa\u8bae\u4f7f\u7528\u4e0b\u4e00\u4e2a\u65b9\u6cd5\u3002<\/p>\n<\/p>\n
\u4e8c\u3001\u4f7f\u7528\u5b57\u5178\uff08dictionary\uff09\u53bb\u91cd<\/h3>\n<\/p>\n
\u5b57\u5178\u662f\u952e\u503c\u5bf9\u7684\u96c6\u5408\uff0c\u952e\u5177\u6709\u552f\u4e00\u6027\uff0c\u56e0\u6b64\u53ef\u4ee5\u5229\u7528\u5b57\u5178\u7684\u952e\u53bb\u91cd\u3002<\/p>\n<\/p>\n
2.1 \u4f7f\u7528\u5b57\u5178\u952e\u53bb\u91cd<\/h4>\n<\/p>\n
\u901a\u8fc7\u5b57\u5178\u7684\u952e\u6765\u53bb\u9664\u91cd\u590d\u503c\uff0c\u4fdd\u6301\u539f\u5217\u8868\u987a\u5e8f\uff1a<\/p>\n<\/p>\n
my_list = [1, 2, 2, 3, 4, 4, 5]<\/p>\n
unique_dict = dict.fromkeys(my_list)<\/p>\n
for item in unique_dict:<\/p>\n
    print(item)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cdict.fromkeys(my_list)<\/code>\u4f1a\u521b\u5efa\u4e00\u4e2a\u952e\u4e3a\u5217\u8868\u5143\u7d20\u7684\u5b57\u5178\uff0c\u4ece\u800c\u53bb\u9664\u91cd\u590d\u503c\uff0c\u5e76\u4fdd\u6301\u539f\u5217\u8868\u7684\u987a\u5e8f\u3002<\/p>\n<\/p>\n
\u4e09\u3001\u4f7f\u7528\u5217\u8868\u63a8\u5bfc\u5f0f\u53bb\u91cd<\/h3>\n<\/p>\n
\u4f7f\u7528\u5217\u8868\u63a8\u5bfc\u5f0f\u7ed3\u5408\u96c6\u5408\u6765\u53bb\u91cd\uff0c\u4fdd\u6301\u539f\u5217\u8868\u987a\u5e8f\uff1a<\/p>\n<\/p>\n
my_list = [1, 2, 2, 3, 4, 4, 5]<\/p>\n
seen = set()<\/p>\n
unique_list = [x for x in my_list if not (x in seen or seen.add(x))]<\/p>\n
for item in unique_list:<\/p>\n
    print(item)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u901a\u8fc7\u5217\u8868\u63a8\u5bfc\u5f0f\u548c\u96c6\u5408\u7684\u7ed3\u5408\uff0c\u65e2\u80fd\u53bb\u9664\u91cd\u590d\u503c\uff0c\u53c8\u80fd\u4fdd\u6301\u539f\u5217\u8868\u7684\u987a\u5e8f\u3002<\/p>\n<\/p>\n
\u56db\u3001\u4f7f\u7528Pandas\u53bb\u91cd<\/h3>\n<\/p>\n
\u5982\u679c\u4f60\u6b63\u5728\u5904\u7406\u7684\u6570\u636e\u6bd4\u8f83\u590d\u6742\u6216\u8005\u6570\u636e\u91cf\u8f83\u5927\uff0c\u53ef\u4ee5\u4f7f\u7528Pandas\u5e93\u6765\u53bb\u9664\u91cd\u590d\u503c\u3002<\/p>\n<\/p>\n
4.1 \u4f7f\u7528Pandas\u53bb\u91cd<\/h4>\n<\/p>\n
import pandas as pd<\/p>\n
my_list = [1, 2, 2, 3, 4, 4, 5]<\/p>\n
unique_series = pd.Series(my_list).drop_duplicates()<\/p>\n
for item in unique_series:<\/p>\n
    print(item)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u901a\u8fc7pandas.Series<\/code>\u5c06\u5217\u8868\u8f6c\u6362\u4e3aPandas\u7684Series\u5bf9\u8c61\uff0c\u7136\u540e\u4f7f\u7528drop_duplicates<\/code>\u65b9\u6cd5\u53bb\u9664\u91cd\u590d\u503c\u3002<\/p>\n<\/p>\n
\u4e94\u3001\u5e94\u7528\u573a\u666f\u548c\u6ce8\u610f\u4e8b\u9879<\/h3>\n<\/p>\n
5.1 \u5e94\u7528\u573a\u666f<\/h4>\n<\/p>\n