<\/span><\/h2>\n\n\n\n\u573a\u666f<\/strong>\uff1a\u5f53\u6211\u4eec\u6709\u4e00\u4e2a\u5305\u542b\u91cd\u590d\u952e\u503c\u5bf9\u7684\u5b57\u5178\uff0c\u60f3\u8981\u5f97\u5230\u4e00\u4e2a\u6ca1\u6709\u91cd\u590d\u952e\u7684\u5b57\u5178\u3002<\/p>\n\n\n\n# \u5047\u8bbe\u7684\u539f\u59cb\u5b57\u5178<\/em>
my_dict = {'a': 1, 'b': 2, 'a': 3}
# \u57fa\u7840\u65b9\u6cd5\uff1a\u5229\u7528\u5b57\u5178\u7684\u7279\u6027\u81ea\u52a8\u53bb\u91cd\uff08\u952e\u552f\u4e00\uff09<\/em>
unique_dict = dict(my_dict)
print(unique_dict) # \u8f93\u51fa: {'a': 3, 'b': 2}<\/em><\/code><\/pre>\n\n\n\n\u6ce8\u610f<\/strong>\uff1a\u8fd9\u79cd\u65b9\u6cd5\u4ec5\u9002\u7528\u4e8e\u952e\u7684\u53bb\u91cd\uff0c\u5982\u679c\u952e\u76f8\u540c\uff0c\u540e\u9762\u7684\u503c\u4f1a\u8986\u76d6\u524d\u9762\u7684\u503c\u3002<\/p>\n\n\n\n<\/span>\u65b9\u6cd52\uff1a\u57fa\u4e8e\u5217\u8868\u63a8\u5bfc\u7684\u53bb\u91cd<\/strong><\/span><\/h2>\n\n\n\n\u573a\u666f<\/strong>\uff1a\u5f53\u4f60\u9700\u8981\u6839\u636e\u5b57\u5178\u7684\u503c\u8fdb\u884c\u53bb\u91cd\u3002<\/p>\n\n\n\ndata = [{'key': 'a', 'value': 1}, {'key': 'b', 'value': 2}, {'key': 'a', 'value': 1}]
unique_by_value = {item['value']: item for item in data}
print(unique_by_value) # \u8f93\u51fa: {1: {'key': 'a', 'value': 1}, 2: {'key': 'b', 'value': 2}}<\/em><\/code><\/pre>\n\n\n\n\u89e3\u91ca<\/strong>\uff1a\u8fd9\u91cc\u6211\u4eec\u521b\u5efa\u4e86\u4e00\u4e2a\u65b0\u7684\u5b57\u5178\uff0c\u952e\u662f\u539f\u5b57\u5178\u4e2d\u7684\u503c\uff0c\u8fd9\u6837\u5c31\u5b9e\u73b0\u4e86\u6839\u636e\u503c\u53bb\u91cd\u3002<\/p>\n\n\n\n<\/span>\u65b9\u6cd53\uff1a\u5229\u7528\u96c6\u5408\u8fdb\u884c\u952e\u7684\u53bb\u91cd<\/strong><\/span><\/h2>\n\n\n\n\u8fdb\u9636<\/strong>\uff1a\u5982\u679c\u9700\u8981\u4fdd\u6301\u952e\u7684\u987a\u5e8f\uff0cPython 3.7+\u4e4b\u540e\u5b57\u5178\u4fdd\u6301\u63d2\u5165\u987a\u5e8f\uff0c\u6211\u4eec\u53ef\u4ee5\u8fd9\u6837\u505a\uff1a<\/p>\n\n\n\nfrom collections import OrderedDict
my_dict = {'a': 1, 'b': 2, 'a': 3}
ordered_dict = OrderedDict(my_dict)
print(ordered_dict) # \u8f93\u51fa: OrderedDict([('a', 3), ('b', 2)])<\/em><\/code><\/pre>\n\n\n\n\u6280\u5de7<\/strong>\uff1aOrderedDict<\/code>\u4fdd\u7559\u4e86\u63d2\u5165\u987a\u5e8f\uff0c\u907f\u514d\u4e86\u666e\u901a\u5b57\u5178\u81ea\u52a8\u8986\u76d6\u952e\u7684\u95ee\u9898\u3002<\/p>\n\n\n\n<\/span>\u65b9\u6cd54\uff1a\u6761\u4ef6\u8fc7\u6ee4<\/strong><\/span><\/h2>\n\n\n\n\u573a\u666f<\/strong>\uff1a\u53ea\u4fdd\u7559\u6ee1\u8db3\u7279\u5b9a\u6761\u4ef6\u7684\u952e\u503c\u5bf9\uff0c\u6bd4\u5982\u503c\u5927\u4e8e\u67d0\u4e2a\u9608\u503c\u3002<\/p>\n\n\n\nthreshold = 2
filtered_dict = {k: v for k, v in my_dict.items() if v > threshold}
print(filtered_dict) # \u8f93\u51fa: {'b': 2}<\/em><\/code><\/pre>\n\n\n\n\u89e3\u6790<\/strong>\uff1a\u4f7f\u7528\u5b57\u5178\u63a8\u5bfc\u5f0f\uff0c\u901a\u8fc7\u6761\u4ef6\u8868\u8fbe\u5f0f\u8fc7\u6ee4\u952e\u503c\u5bf9\u3002<\/p>\n\n\n\n<\/span>\u65b9\u6cd55\uff1a\u4f7f\u7528filter()<\/code>\u51fd\u6570<\/strong><\/span><\/h2>\n\n\n\n\u573a\u666f<\/strong>\uff1a\u901a\u8fc7\u51fd\u6570\u6765\u51b3\u5b9a\u54ea\u4e9b\u952e\u503c\u5bf9\u88ab\u4fdd\u7559\u3002<\/p>\n\n\n\ndef filter_condition(item):
return item[1] > 2
filtered_dict = dict(filter(filter_condition, my_dict.items()))
print(filtered_dict) # \u8f93\u51fa: {'b': 2}<\/em><\/code><\/pre>\n\n\n\n\u8bf4\u660e<\/strong>\uff1afilter()<\/code>\u51fd\u6570\u63a5\u53d7\u4e00\u4e2a\u51fd\u6570\u548c\u4e00\u4e2a\u53ef\u8fed\u4ee3\u5bf9\u8c61\uff0c\u8fd4\u56de\u4e00\u4e2a\u8fed\u4ee3\u5668\uff0c\u8be5\u8fed\u4ee3\u5668\u5305\u542b\u4e86\u6240\u6709\u4f7f\u8be5\u51fd\u6570\u8fd4\u56deTrue\u7684\u5143\u7d20\u3002<\/p>\n\n\n\n<\/span>\u65b9\u6cd56\uff1a\u5229\u7528itertools.groupby()<\/code>\u7684\u9ad8\u7ea7\u53bb\u91cd<\/strong><\/span><\/h2>\n\n\n\n\u6ce8\u610f<\/strong>\uff1a\u6b64\u65b9\u6cd5\u9002\u7528\u4e8e\u5217\u8868\u4e2d\u7684\u5b57\u5178\uff0c\u6309\u67d0\u4e2a\u952e\u53bb\u91cd\u3002<\/p>\n\n\n\nfrom itertools import groupby
sorted_data = sorted(data, key=lambda x: x['value'])
grouped = groupby(sorted_data, lambda x: x['value'])
unique_groups = {k: next(v) for k, v in grouped}
print(unique_groups) # \u5047\u8bbedata\u662f\u4e4b\u524d\u5b9a\u4e49\u7684\u5217\u8868\uff0c\u8f93\u51fa\u5c06\u57fa\u4e8e\u503c\u53bb\u91cd\u540e\u7684\u7b2c\u4e00\u4e2a\u51fa\u73b0\u7684\u5b57\u5178<\/em><\/code><\/pre>\n\n\n\n\u89e3\u6790<\/strong>\uff1a\u5148\u6392\u5e8f\uff0c\u7136\u540e\u4f7f\u7528groupby()<\/code>\u6309\u503c\u5206\u7ec4\uff0c\u6700\u540e\u901a\u8fc7\u5b57\u5178\u63a8\u5bfc\u5f0f\u83b7\u53d6\u6bcf\u4e2a\u7ec4\u7684\u7b2c\u4e00\u4e2a\u5143\u7d20\u3002<\/p>\n\n\n\n<\/span>\u65b9\u6cd57\uff1a\u7ed3\u5408set()<\/code>\u548c\u5217\u8868\u63a8\u5bfc\u53bb\u91cd\u952e\u503c\u5bf9<\/strong><\/span><\/h2>\n\n\n\n\u573a\u666f<\/strong>\uff1a\u5f53\u952e\u548c\u503c\u90fd\u9700\u8981\u552f\u4e00\u65f6\uff0c\u53ef\u4ee5\u8fd9\u6837\u505a\uff1a<\/p>\n\n\n\nunique_pairs = {tuple(item) for item in my_dict.items()}
recreated_dict = dict(unique_pairs)
print(recreated_dict)<\/code><\/pre>\n\n\n\n\u6280\u5de7<\/strong>\uff1a\u8f6c\u6362\u4e3a\u5143\u7ec4\u96c6\u53bb\u91cd\uff0c\u518d\u8f6c\u56de\u5b57\u5178\u3002\u4f46\u6ce8\u610f\uff0c\u8fd9\u5c06\u5931\u53bb\u539f\u59cb\u952e\u503c\u5bf9\u7684\u987a\u5e8f\u3002<\/p>\n\n\n\n