![\"python\u5982\u4f55\u4ece\u5b57\u5178\u4e2d\u53d6\u591a\u4e2a\u503c\"](\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/24210557\/260d7b29-e54d-4da7-bb94-be51cd6b69ea.webp\")
<\/p>\n<\/p>\n
Python\u5982\u4f55\u4ece\u5b57\u5178\u4e2d\u53d6\u591a\u4e2a\u503c<\/strong>\uff1a\u901a\u8fc7\u952e\u5217\u8868\u53d6\u503c\u3001\u4f7f\u7528\u5b57\u5178\u63a8\u5bfc\u5f0f\u3001\u4f7f\u7528map\u51fd\u6570\u3002\u4ece\u5b57\u5178\u4e2d\u53d6\u591a\u4e2a\u503c\u65f6\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u952e\u5217\u8868\u6765\u4e00\u6b21\u6027\u83b7\u53d6\u6240\u9700\u7684\u503c\u3002\u4ee5\u4e0b\u662f\u8be6\u7ec6\u63cf\u8ff0\u5982\u4f55\u901a\u8fc7\u952e\u5217\u8868\u53d6\u503c\uff1a<\/p>\n<\/p>\n \u5728Python\u4e2d\uff0c\u5b57\u5178\uff08dictionary\uff09\u662f\u4e00\u79cd\u7528\u4e8e\u5b58\u50a8\u952e\u503c\u5bf9\u7684\u6570\u636e\u7ed3\u6784\u3002\u5f53\u6211\u4eec\u9700\u8981\u4ece\u5b57\u5178\u4e2d\u83b7\u53d6\u591a\u4e2a\u503c\u65f6\uff0c\u53ef\u4ee5\u901a\u8fc7\u904d\u5386\u952e\u5217\u8868\uff0c\u7136\u540e\u4f7f\u7528\u5b57\u5178\u7684get()\u65b9\u6cd5\u83b7\u53d6\u76f8\u5e94\u7684\u503c\u3002\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0c\u6211\u4eec\u4e0d\u4ec5\u53ef\u4ee5\u4e00\u6b21\u6027\u83b7\u53d6\u591a\u4e2a\u503c\uff0c\u8fd8\u53ef\u4ee5\u5728\u952e\u4e0d\u5b58\u5728\u65f6\u63d0\u4f9b\u9ed8\u8ba4\u503c\uff0c\u4ece\u800c\u907f\u514dKeyError\u5f02\u5e38\u3002<\/p>\n<\/p>\n \u4ee5\u4e0b\u662f\u4f7f\u7528\u952e\u5217\u8868\u53d6\u503c\u7684\u5177\u4f53\u6b65\u9aa4\u548c\u793a\u4f8b\uff1a<\/p>\n<\/p>\n \u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<\/p>\n my_dict = {<\/p>\n 'name': 'Alice',<\/p>\n 'age': 30,<\/p>\n 'city': 'New York',<\/p>\n 'job': 'Engineer'<\/p>\n }<\/p>\n keys = ['name', 'age', 'city']<\/p>\n values = [my_dict.get(key) for key in keys]<\/p>\n print(values) # \u8f93\u51fa: ['Alice', 30, 'New York']<\/p>\n <\/code><\/pre>\n<\/p>\n \u8fd9\u79cd\u65b9\u6cd5\u4e0d\u4ec5\u7b80\u6d01\uff0c\u800c\u4e14\u80fd\u591f\u6709\u6548\u907f\u514d\u952e\u4e0d\u5b58\u5728\u65f6\u5f15\u53d1\u7684\u5f02\u5e38\u3002\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5c06\u63a2\u8ba8\u5176\u4ed6\u65b9\u6cd5\uff0c\u5982\u5b57\u5178\u63a8\u5bfc\u5f0f\u548cmap\u51fd\u6570\uff0c\u6765\u5b9e\u73b0\u4ece\u5b57\u5178\u4e2d\u53d6\u591a\u4e2a\u503c\u7684\u9700\u6c42\u3002<\/p>\n<\/p>\n \u901a\u8fc7\u952e\u5217\u8868\u53d6\u503c\u662f\u4ece\u5b57\u5178\u4e2d\u83b7\u53d6\u591a\u4e2a\u503c\u7684\u5e38\u89c1\u65b9\u6cd5\u4e4b\u4e00\u3002\u8fd9\u79cd\u65b9\u6cd5\u5229\u7528\u952e\u5217\u8868\u548c\u5b57\u5178\u7684get()\u65b9\u6cd5\u6765\u5b9e\u73b0\u3002<\/p>\n<\/p>\n \u5217\u8868\u63a8\u5bfc\u5f0f\u662f\u4e00\u79cd\u7b80\u6d01\u9ad8\u6548\u7684\u65b9\u5f0f\uff0c\u7528\u4e8e\u4ece\u5b57\u5178\u4e2d\u83b7\u53d6\u591a\u4e2a\u503c\u3002\u901a\u8fc7\u904d\u5386\u952e\u5217\u8868\uff0c\u5e76\u8c03\u7528\u5b57\u5178\u7684get()\u65b9\u6cd5\u83b7\u53d6\u76f8\u5e94\u7684\u503c\uff0c\u6211\u4eec\u53ef\u4ee5\u5feb\u901f\u751f\u6210\u4e00\u4e2a\u5305\u542b\u6240\u9700\u503c\u7684\u5217\u8868\u3002<\/p>\n<\/p>\n \u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<\/p>\n my_dict = {<\/p>\n 'name': 'Alice',<\/p>\n 'age': 30,<\/p>\n 'city': 'New York',<\/p>\n 'job': 'Engineer'<\/p>\n }<\/p>\n keys = ['name', 'age', 'city']<\/p>\n values = [my_dict.get(key) for key in keys]<\/p>\n print(values) # \u8f93\u51fa: ['Alice', 30, 'New York']<\/p>\n <\/code><\/pre>\n<\/p>\n \u9664\u4e86\u5217\u8868\u63a8\u5bfc\u5f0f\uff0c\u6211\u4eec\u8fd8\u53ef\u4ee5\u4f7f\u7528for\u5faa\u73af\u6765\u904d\u5386\u952e\u5217\u8868\uff0c\u5e76\u83b7\u53d6\u76f8\u5e94\u7684\u503c\u3002\u867d\u7136\u8fd9\u79cd\u65b9\u6cd5\u7565\u663e\u5197\u957f\uff0c\u4f46\u5b83\u63d0\u4f9b\u4e86\u66f4\u591a\u7684\u7075\u6d3b\u6027\u3002<\/p>\n<\/p>\n \u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<\/p>\n my_dict = {<\/p>\n 'name': 'Alice',<\/p>\n 'age': 30,<\/p>\n 'city': 'New York',<\/p>\n 'job': 'Engineer'<\/p>\n }<\/p>\n keys = ['name', 'age', 'city']<\/p>\n values = []<\/p>\n for key in keys:<\/p>\n values.append(my_dict.get(key))<\/p>\n print(values) # \u8f93\u51fa: ['Alice', 30, 'New York']<\/p>\n <\/code><\/pre>\n<\/p>\n \u5b57\u5178\u63a8\u5bfc\u5f0f\u662f\u4e00\u79cd\u751f\u6210\u65b0\u5b57\u5178\u7684\u7b80\u6d01\u65b9\u5f0f\u3002\u901a\u8fc7\u5b57\u5178\u63a8\u5bfc\u5f0f\uff0c\u6211\u4eec\u53ef\u4ee5\u6839\u636e\u952e\u5217\u8868\u751f\u6210\u4e00\u4e2a\u5305\u542b\u6240\u9700\u952e\u503c\u5bf9\u7684\u65b0\u5b57\u5178\u3002\u8fd9\u79cd\u65b9\u6cd5\u4e0d\u4ec5\u53ef\u4ee5\u83b7\u53d6\u591a\u4e2a\u503c\uff0c\u8fd8\u53ef\u4ee5\u5c06\u7ed3\u679c\u4ee5\u5b57\u5178\u7684\u5f62\u5f0f\u5b58\u50a8\u3002<\/p>\n<\/p>\n \u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<\/p>\n my_dict = {<\/p>\n 'name': 'Alice',<\/p>\n 'age': 30,<\/p>\n 'city': 'New York',<\/p>\n 'job': 'Engineer'<\/p>\n }<\/p>\n keys = ['name', 'age', 'city']<\/p>\n result_dict = {key: my_dict.get(key) for key in keys}<\/p>\n print(result_dict) # \u8f93\u51fa: {'name': 'Alice', 'age': 30, 'city': 'New York'}<\/p>\n <\/code><\/pre>\n<\/p>\n map\u51fd\u6570\u662f\u4e00\u79cd\u51fd\u6570\u5f0f\u7f16\u7a0b\u7684\u5de5\u5177\uff0c\u5b83\u53ef\u4ee5\u5c06\u6307\u5b9a\u51fd\u6570\u5e94\u7528\u4e8e\u53ef\u8fed\u4ee3\u5bf9\u8c61\u7684\u6bcf\u4e2a\u5143\u7d20\u3002\u5728\u4ece\u5b57\u5178\u4e2d\u83b7\u53d6\u591a\u4e2a\u503c\u65f6\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06map\u51fd\u6570\u4e0elambda\u8868\u8fbe\u5f0f\u7ed3\u5408\u4f7f\u7528\uff0c\u4ee5\u7b80\u6d01\u9ad8\u6548\u7684\u65b9\u5f0f\u83b7\u53d6\u6240\u9700\u7684\u503c\u3002<\/p>\n<\/p>\n \u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<\/p>\n my_dict = {<\/p>\n 'name': 'Alice',<\/p>\n 'age': 30,<\/p>\n 'city': 'New York',<\/p>\n 'job': 'Engineer'<\/p>\n }<\/p>\n keys = ['name', 'age', 'city']<\/p>\n values = list(map(lambda key: my_dict.get(key), keys))<\/p>\n print(values) # \u8f93\u51fa: ['Alice', 30, 'New York']<\/p>\n <\/code><\/pre>\n<\/p>\n operator\u6a21\u5757\u4e2d\u7684itemgetter\u51fd\u6570\u662f\u4e00\u4e2a\u5f3a\u5927\u7684\u5de5\u5177\uff0c\u5b83\u53ef\u4ee5\u6839\u636e\u7ed9\u5b9a\u7684\u952e\u4ece\u5b57\u5178\u4e2d\u63d0\u53d6\u76f8\u5e94\u7684\u503c\u3002\u4e0e\u524d\u9762\u7684\u65b9\u6cd5\u76f8\u6bd4\uff0citemgetter\u63d0\u4f9b\u4e86\u4e00\u79cd\u66f4\u52a0\u9ad8\u6548\u7684\u65b9\u5f0f\u6765\u83b7\u53d6\u591a\u4e2a\u503c\u3002<\/p>\n<\/p>\n \u9996\u5148\uff0c\u6211\u4eec\u9700\u8981\u5bfc\u5165operator\u6a21\u5757\uff0c\u7136\u540e\u4f7f\u7528itemgetter\u51fd\u6570\u521b\u5efa\u4e00\u4e2a\u63d0\u53d6\u5668\u3002\u901a\u8fc7\u8c03\u7528\u63d0\u53d6\u5668\u5e76\u4f20\u5165\u5b57\u5178\uff0c\u6211\u4eec\u53ef\u4ee5\u4e00\u6b21\u6027\u83b7\u53d6\u6240\u9700\u7684\u503c\u3002<\/p>\n<\/p>\n \u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<\/p>\n my_dict = {<\/p>\n 'name': 'Alice',<\/p>\n 'age': 30,<\/p>\n 'city': 'New York',<\/p>\n 'job': 'Engineer'<\/p>\n }<\/p>\n keys = ['name', 'age', 'city']<\/p>\n getter = itemgetter(*keys)<\/p>\n values = getter(my_dict)<\/p>\n print(values) # \u8f93\u51fa: ('Alice', 30, 'New York')<\/p>\n <\/code><\/pre>\n<\/p>\n pandas\u662f\u4e00\u4e2a\u5f3a\u5927\u7684\u6570\u636e\u5904\u7406\u5e93\uff0c\u5e7f\u6cdb\u7528\u4e8e\u6570\u636e\u5206\u6790\u548c\u5904\u7406\u3002\u4f7f\u7528pandas\u5e93\uff0c\u6211\u4eec\u53ef\u4ee5\u8f7b\u677e\u4ece\u5b57\u5178\u4e2d\u83b7\u53d6\u591a\u4e2a\u503c\uff0c\u5e76\u5c06\u7ed3\u679c\u5b58\u50a8\u5728DataFrame\u4e2d\u3002<\/p>\n<\/p>\n \u9996\u5148\uff0c\u6211\u4eec\u9700\u8981\u5b89\u88c5\u5e76\u5bfc\u5165pandas\u5e93\u3002\u7136\u540e\uff0c\u5c06\u5b57\u5178\u8f6c\u6362\u4e3aDataFrame\uff0c\u5e76\u901a\u8fc7\u5217\u540d\u83b7\u53d6\u6240\u9700\u7684\u503c\u3002<\/p>\n<\/p>\n \u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<\/p>\n my_dict = {<\/p>\n 'name': 'Alice',<\/p>\n 'age': 30,<\/p>\n 'city': 'New York',<\/p>\n 'job': 'Engineer'<\/p>\n }<\/p>\n df = pd.DataFrame([my_dict])<\/p>\n values = df[['name', 'age', 'city']].values.tolist()[0]<\/p>\n print(values) # \u8f93\u51fa: ['Alice', 30, 'New York']<\/p>\n <\/code><\/pre>\n<\/p>\n \u4f7f\u7528pandas\u5e93\u4e0d\u4ec5\u53ef\u4ee5\u83b7\u53d6\u591a\u4e2a\u503c\uff0c\u8fd8\u53ef\u4ee5\u5229\u7528\u5176\u5f3a\u5927\u7684\u6570\u636e\u5904\u7406\u529f\u80fd\u8fdb\u884c\u8fdb\u4e00\u6b65\u7684\u5206\u6790\u548c\u64cd\u4f5c\u3002<\/p>\n<\/p>\n NumPy\u662f\u4e00\u4e2a\u5e7f\u6cdb\u7528\u4e8e\u79d1\u5b66\u8ba1\u7b97\u7684\u5e93\uff0c\u63d0\u4f9b\u4e86\u9ad8\u6548\u7684\u6570\u7ec4\u64cd\u4f5c\u529f\u80fd\u3002\u4f7f\u7528NumPy\u5e93\uff0c\u6211\u4eec\u53ef\u4ee5\u4ece\u5b57\u5178\u4e2d\u83b7\u53d6\u591a\u4e2a\u503c\uff0c\u5e76\u5c06\u7ed3\u679c\u5b58\u50a8\u5728NumPy\u6570\u7ec4\u4e2d\u3002<\/p>\n<\/p>\n \u9996\u5148\uff0c\u6211\u4eec\u9700\u8981\u5b89\u88c5\u5e76\u5bfc\u5165NumPy\u5e93\u3002\u7136\u540e\uff0c\u5c06\u5b57\u5178\u8f6c\u6362\u4e3aNumPy\u6570\u7ec4\uff0c\u5e76\u901a\u8fc7\u952e\u5217\u8868\u83b7\u53d6\u6240\u9700\u7684\u503c\u3002<\/p>\n<\/p>\n \u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<\/p>\n my_dict = {<\/p>\n 'name': 'Alice',<\/p>\n 'age': 30,<\/p>\n 'city': 'New York',<\/p>\n 'job': 'Engineer'<\/p>\n }<\/p>\n keys = ['name', 'age', 'city']<\/p>\n values = np.array([my_dict.get(key) for key in keys])<\/p>\n print(values) # \u8f93\u51fa: ['Alice' '30' 'New York']<\/p>\n <\/code><\/pre>\n<\/p>\n \u4f7f\u7528NumPy\u5e93\u53ef\u4ee5\u9ad8\u6548\u5904\u7406\u5927\u91cf\u6570\u636e\uff0c\u5e76\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u6570\u7ec4\u64cd\u4f5c\u529f\u80fd\uff0c\u9002\u5408\u9700\u8981\u8fdb\u884c\u79d1\u5b66\u8ba1\u7b97\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n zip\u51fd\u6570\u7528\u4e8e\u5c06\u591a\u4e2a\u53ef\u8fed\u4ee3\u5bf9\u8c61\u7684\u5143\u7d20\u6253\u5305\u6210\u5143\u7ec4\u3002\u7ed3\u5408zip\u548c\u5217\u8868\u63a8\u5bfc\u5f0f\uff0c\u6211\u4eec\u53ef\u4ee5\u4ece\u5b57\u5178\u4e2d\u83b7\u53d6\u591a\u4e2a\u503c\uff0c\u5e76\u5c06\u7ed3\u679c\u4ee5\u952e\u503c\u5bf9\u7684\u5f62\u5f0f\u5b58\u50a8\u5728\u5217\u8868\u4e2d\u3002<\/p>\n<\/p>\n \u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<\/p>\n my_dict = {<\/p>\n 'name': 'Alice',<\/p>\n 'age': 30,<\/p>\n 'city': 'New York',<\/p>\n 'job': 'Engineer'<\/p>\n }<\/p>\n keys = ['name', 'age', 'city']<\/p>\n values = [(key, my_dict.get(key)) for key in keys]<\/p>\n print(values) # \u8f93\u51fa: [('name', 'Alice'), ('age', 30), ('city', 'New York')]<\/p>\n <\/code><\/pre>\n<\/p>\n \u8fd9\u79cd\u65b9\u6cd5\u4e0d\u4ec5\u53ef\u4ee5\u83b7\u53d6\u591a\u4e2a\u503c\uff0c\u8fd8\u53ef\u4ee5\u5c06\u7ed3\u679c\u4ee5\u952e\u503c\u5bf9\u7684\u5f62\u5f0f\u5b58\u50a8\uff0c\u4fbf\u4e8e\u540e\u7eed\u64cd\u4f5c\u3002<\/p>\n<\/p>\n collections\u6a21\u5757\u4e2d\u7684defaultdict\u662f\u4e00\u79cd\u5b57\u5178\u5b50\u7c7b\uff0c\u63d0\u4f9b\u4e86\u9ed8\u8ba4\u503c\u529f\u80fd\u3002\u4f7f\u7528defaultdict\uff0c\u6211\u4eec\u53ef\u4ee5\u907f\u514d\u952e\u4e0d\u5b58\u5728\u65f6\u5f15\u53d1\u7684KeyError\u5f02\u5e38\uff0c\u5e76\u7b80\u5316\u4ece\u5b57\u5178\u4e2d\u83b7\u53d6\u591a\u4e2a\u503c\u7684\u64cd\u4f5c\u3002<\/p>\n<\/p>\n \u9996\u5148\uff0c\u6211\u4eec\u9700\u8981\u5bfc\u5165collections\u6a21\u5757\uff0c\u7136\u540e\u521b\u5efa\u4e00\u4e2adefaultdict\u5bf9\u8c61\u3002\u901a\u8fc7\u904d\u5386\u952e\u5217\u8868\uff0c\u5e76\u8c03\u7528defaultdict\u7684get()\u65b9\u6cd5\u83b7\u53d6\u503c\uff0c\u6211\u4eec\u53ef\u4ee5\u8f7b\u677e\u5b9e\u73b0\u4ece\u5b57\u5178\u4e2d\u83b7\u53d6\u591a\u4e2a\u503c\u7684\u9700\u6c42\u3002<\/p>\n<\/p>\n \u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<\/p>\n my_dict = {<\/p>\n 'name': 'Alice',<\/p>\n 'age': 30,<\/p>\n 'city': 'New York',<\/p>\n 'job': 'Engineer'<\/p>\n }<\/p>\n default_dict = defaultdict(lambda: 'N\/A', my_dict)<\/p>\n keys = ['name', 'age', 'city', 'country']<\/p>\n values = [default_dict[key] for key in keys]<\/p>\n print(values) # \u8f93\u51fa: ['Alice', 30, 'New York', 'N\/A']<\/p>\n <\/code><\/pre>\n<\/p>\n \u4f7f\u7528defaultdict\u4e0d\u4ec5\u53ef\u4ee5\u907f\u514dKeyError\u5f02\u5e38\uff0c\u8fd8\u53ef\u4ee5\u63d0\u4f9b\u9ed8\u8ba4\u503c\u529f\u80fd\uff0c\u589e\u5f3a\u4ee3\u7801\u7684\u9c81\u68d2\u6027\u3002<\/p>\n<\/p>\n \u4e3a\u4e86\u63d0\u9ad8\u4ee3\u7801\u7684\u91cd\u7528\u6027\u548c\u53ef\u8bfb\u6027\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u4ece\u5b57\u5178\u4e2d\u83b7\u53d6\u591a\u4e2a\u503c\u7684\u64cd\u4f5c\u5c01\u88c5\u6210\u4e00\u4e2a\u51fd\u6570\u3002\u901a\u8fc7\u4f20\u5165\u5b57\u5178\u548c\u952e\u5217\u8868\uff0c\u51fd\u6570\u53ef\u4ee5\u8fd4\u56de\u6240\u9700\u7684\u503c\u3002<\/p>\n<\/p>\n \u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<\/p>\n return [dictionary.get(key) for key in keys]<\/p>\n my_dict = {<\/p>\n 'name': 'Alice',<\/p>\n 'age': 30,<\/p>\n 'city': 'New York',<\/p>\n 'job': 'Engineer'<\/p>\n }<\/p>\n keys = ['name', 'age', 'city']<\/p>\n values = get_multiple_values(my_dict, keys)<\/p>\n print(values) # \u8f93\u51fa: ['Alice', 30, 'New York']<\/p>\n <\/code><\/pre>\n<\/p>\n \u901a\u8fc7\u51fd\u6570\u5c01\u88c5\uff0c\u6211\u4eec\u53ef\u4ee5\u63d0\u9ad8\u4ee3\u7801\u7684\u590d\u7528\u6027\uff0c\u5e76\u4f7f\u4ee3\u7801\u7ed3\u6784\u66f4\u52a0\u6e05\u6670\u3002<\/p>\n<\/p>\n \u9664\u4e86\u51fd\u6570\u5c01\u88c5\uff0c\u6211\u4eec\u8fd8\u53ef\u4ee5\u4f7f\u7528\u7c7b\u6765\u5c01\u88c5\u4ece\u5b57\u5178\u4e2d\u83b7\u53d6\u591a\u4e2a\u503c\u7684\u64cd\u4f5c\u3002\u901a\u8fc7\u5b9a\u4e49\u4e00\u4e2a\u5305\u542b\u83b7\u53d6\u503c\u65b9\u6cd5\u7684\u7c7b\uff0c\u6211\u4eec\u53ef\u4ee5\u521b\u5efa\u5bf9\u8c61\uff0c\u5e76\u8c03\u7528\u65b9\u6cd5\u83b7\u53d6\u6240\u9700\u7684\u503c\u3002<\/p>\n<\/p>\n \u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<\/p>\n def __init__(self, dictionary):<\/p>\n self.dictionary = dictionary<\/p>\n def get_values(self, keys):<\/p>\n return [self.dictionary.get(key) for key in keys]<\/p>\n my_dict = {<\/p>\n 'name': 'Alice',<\/p>\n 'age': 30,<\/p>\n 'city': 'New York',<\/p>\n 'job': 'Engineer'<\/p>\n }<\/p>\n helper = DictionaryHelper(my_dict)<\/p>\n keys = ['name', 'age', 'city']<\/p>\n values = helper.get_values(keys)<\/p>\n print(values) # \u8f93\u51fa: ['Alice', 30, 'New York']<\/p>\n <\/code><\/pre>\n<\/p>\n \u4f7f\u7528\u7c7b\u5c01\u88c5\u53ef\u4ee5\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u7ef4\u62a4\u6027\u548c\u6269\u5c55\u6027\uff0c\u9002\u5408\u9700\u8981\u8fdb\u884c\u590d\u6742\u6570\u636e\u64cd\u4f5c\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n \u901a\u8fc7\u4e0a\u8ff0\u591a\u79cd\u65b9\u6cd5\uff0c\u6211\u4eec\u53ef\u4ee5\u7075\u6d3b\u5730\u4ece\u5b57\u5178\u4e2d\u83b7\u53d6\u591a\u4e2a\u503c\uff0c\u5e76\u6839\u636e\u5177\u4f53\u9700\u6c42\u9009\u62e9\u6700\u5408\u9002\u7684\u65b9\u6cd5\u3002\u5e0c\u671b\u672c\u6587\u63d0\u4f9b\u7684\u8be6\u7ec6\u4ecb\u7ecd\u548c\u793a\u4f8b\u4ee3\u7801\u80fd\u591f\u5e2e\u52a9\u4f60\u66f4\u597d\u5730\u7406\u89e3\u548c\u5e94\u7528\u8fd9\u4e9b\u65b9\u6cd5\u3002<\/p>\n<\/p>\n \u5982\u4f55\u4ecePython\u5b57\u5178\u4e2d\u4e00\u6b21\u6027\u63d0\u53d6\u591a\u4e2a\u503c\uff1f<\/strong> \u5728Python\u5b57\u5178\u4e2d\u5982\u4f55\u5904\u7406\u4e0d\u5b58\u5728\u7684\u952e\uff1f<\/strong> \u5982\u4f55\u4f7f\u7528Python\u7684\n
# \u521b\u5efa\u4e00\u4e2a\u5b57\u5178<\/p>\n\u5b9a\u4e49\u4e00\u4e2a\u5305\u542b\u6240\u9700\u952e\u7684\u5217\u8868<\/strong><\/h2>\n
\u4f7f\u7528\u5217\u8868\u63a8\u5bfc\u5f0f\u83b7\u53d6\u591a\u4e2a\u503c<\/strong><\/h2>\n
\u4e00\u3001\u901a\u8fc7\u952e\u5217\u8868\u53d6\u503c<\/h3>\n<\/p>\n
1. \u5217\u8868\u63a8\u5bfc\u5f0f<\/h4>\n<\/p>\n
# \u521b\u5efa\u4e00\u4e2a\u5b57\u5178<\/p>\n\u5b9a\u4e49\u4e00\u4e2a\u5305\u542b\u6240\u9700\u952e\u7684\u5217\u8868<\/strong><\/h2>\n
\u4f7f\u7528\u5217\u8868\u63a8\u5bfc\u5f0f\u83b7\u53d6\u591a\u4e2a\u503c<\/strong><\/h2>\n
2. \u4f7f\u7528for\u5faa\u73af<\/h4>\n<\/p>\n
# \u521b\u5efa\u4e00\u4e2a\u5b57\u5178<\/p>\n\u5b9a\u4e49\u4e00\u4e2a\u5305\u542b\u6240\u9700\u952e\u7684\u5217\u8868<\/strong><\/h2>\n
\u4f7f\u7528for\u5faa\u73af\u83b7\u53d6\u591a\u4e2a\u503c<\/strong><\/h2>\n
\u4e8c\u3001\u4f7f\u7528\u5b57\u5178\u63a8\u5bfc\u5f0f<\/h3>\n<\/p>\n
# \u521b\u5efa\u4e00\u4e2a\u5b57\u5178<\/p>\n\u5b9a\u4e49\u4e00\u4e2a\u5305\u542b\u6240\u9700\u952e\u7684\u5217\u8868<\/strong><\/h2>\n
\u4f7f\u7528\u5b57\u5178\u63a8\u5bfc\u5f0f\u83b7\u53d6\u591a\u4e2a\u503c<\/strong><\/h2>\n
\u4e09\u3001\u4f7f\u7528map\u51fd\u6570<\/h3>\n<\/p>\n
# \u521b\u5efa\u4e00\u4e2a\u5b57\u5178<\/p>\n\u5b9a\u4e49\u4e00\u4e2a\u5305\u542b\u6240\u9700\u952e\u7684\u5217\u8868<\/strong><\/h2>\n
\u4f7f\u7528map\u51fd\u6570\u83b7\u53d6\u591a\u4e2a\u503c<\/strong><\/h2>\n
\u56db\u3001\u4f7f\u7528operator.itemgetter<\/h3>\n<\/p>\n
from operator import itemgetter<\/p>\n\u521b\u5efa\u4e00\u4e2a\u5b57\u5178<\/strong><\/h2>\n
\u5b9a\u4e49\u4e00\u4e2a\u5305\u542b\u6240\u9700\u952e\u7684\u5217\u8868<\/strong><\/h2>\n
\u4f7f\u7528itemgetter\u83b7\u53d6\u591a\u4e2a\u503c<\/strong><\/h2>\n
\u4e94\u3001\u4f7f\u7528pandas\u5e93<\/h3>\n<\/p>\n
import pandas as pd<\/p>\n\u521b\u5efa\u4e00\u4e2a\u5b57\u5178<\/strong><\/h2>\n
\u5c06\u5b57\u5178\u8f6c\u6362\u4e3aDataFrame<\/strong><\/h2>\n
\u83b7\u53d6\u591a\u4e2a\u503c<\/strong><\/h2>\n
\u516d\u3001\u4f7f\u7528NumPy\u5e93<\/h3>\n<\/p>\n
import numpy as np<\/p>\n\u521b\u5efa\u4e00\u4e2a\u5b57\u5178<\/strong><\/h2>\n
\u5c06\u5b57\u5178\u8f6c\u6362\u4e3aNumPy\u6570\u7ec4<\/strong><\/h2>\n
\u4e03\u3001\u7ed3\u5408zip\u548c\u5217\u8868\u63a8\u5bfc\u5f0f<\/h3>\n<\/p>\n
# \u521b\u5efa\u4e00\u4e2a\u5b57\u5178<\/p>\n\u5b9a\u4e49\u4e00\u4e2a\u5305\u542b\u6240\u9700\u952e\u7684\u5217\u8868<\/strong><\/h2>\n
\u4f7f\u7528zip\u548c\u5217\u8868\u63a8\u5bfc\u5f0f\u83b7\u53d6\u591a\u4e2a\u503c<\/strong><\/h2>\n
\u516b\u3001\u4f7f\u7528collections.defaultdict<\/h3>\n<\/p>\n
from collections import defaultdict<\/p>\n\u521b\u5efa\u4e00\u4e2a\u5b57\u5178<\/strong><\/h2>\n
\u521b\u5efa\u4e00\u4e2adefaultdict\u5bf9\u8c61<\/strong><\/h2>\n
\u5b9a\u4e49\u4e00\u4e2a\u5305\u542b\u6240\u9700\u952e\u7684\u5217\u8868<\/strong><\/h2>\n
\u4f7f\u7528defaultdict\u83b7\u53d6\u591a\u4e2a\u503c<\/strong><\/h2>\n
\u4e5d\u3001\u901a\u8fc7\u51fd\u6570\u5c01\u88c5<\/h3>\n<\/p>\n
def get_multiple_values(dictionary, keys):<\/p>\n\u521b\u5efa\u4e00\u4e2a\u5b57\u5178<\/strong><\/h2>\n
\u5b9a\u4e49\u4e00\u4e2a\u5305\u542b\u6240\u9700\u952e\u7684\u5217\u8868<\/strong><\/h2>\n
\u8c03\u7528\u51fd\u6570\u83b7\u53d6\u591a\u4e2a\u503c<\/strong><\/h2>\n
\u5341\u3001\u4f7f\u7528\u7c7b\u5c01\u88c5<\/h3>\n<\/p>\n
class DictionaryHelper:<\/p>\n\u521b\u5efa\u4e00\u4e2a\u5b57\u5178<\/strong><\/h2>\n
\u521b\u5efaDictionaryHelper\u5bf9\u8c61<\/strong><\/h2>\n
\u5b9a\u4e49\u4e00\u4e2a\u5305\u542b\u6240\u9700\u952e\u7684\u5217\u8868<\/strong><\/h2>\n
\u8c03\u7528\u65b9\u6cd5\u83b7\u53d6\u591a\u4e2a\u503c<\/strong><\/h2>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u5217\u8868\u63a8\u5bfc\u5f0f\u6216dict.get()<\/code>\u65b9\u6cd5\u4ece\u5b57\u5178\u4e2d\u63d0\u53d6\u591a\u4e2a\u503c\u3002\u5047\u8bbe\u6709\u4e00\u4e2a\u5b57\u5178my_dict = {'a': 1, 'b': 2, 'c': 3}<\/code>\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528values = [my_dict[key] for key in ['a', 'b']]<\/code>\u6765\u83b7\u53d6['a', 'b']<\/code>\u5bf9\u5e94\u7684\u503c\u3002\u5982\u679c\u67d0\u4e2a\u952e\u53ef\u80fd\u4e0d\u5b58\u5728\uff0c\u4f7f\u7528values = [my_dict.get(key, default_value) for key in ['a', 'b']]<\/code>\u53ef\u4ee5\u907f\u514d\u5f15\u53d1\u9519\u8bef\uff0c\u540c\u65f6\u63d0\u4f9b\u4e00\u4e2a\u9ed8\u8ba4\u503c\u3002<\/p>\n
\u5f53\u4f60\u8bd5\u56fe\u4ece\u5b57\u5178\u4e2d\u83b7\u53d6\u4e00\u4e2a\u4e0d\u5b58\u5728\u7684\u952e\u7684\u503c\u65f6\uff0c\u901a\u5e38\u4f1a\u5f15\u53d1KeyError<\/code>\u3002\u4e3a\u4e86\u907f\u514d\u8fd9\u79cd\u60c5\u51b5\uff0c\u53ef\u4ee5\u4f7f\u7528dict.get()<\/code>\u65b9\u6cd5\uff0c\u5b83\u5141\u8bb8\u4f60\u6307\u5b9a\u4e00\u4e2a\u9ed8\u8ba4\u503c\uff0c\u5982\u679c\u952e\u4e0d\u5b58\u5728\u5219\u8fd4\u56de\u8be5\u9ed8\u8ba4\u503c\u3002\u4f8b\u5982\uff0cvalue = my_dict.get('d', 'not found')<\/code>\u4f1a\u8fd4\u56de'not found'<\/code>\uff0c\u800c\u4e0d\u662f\u5f15\u53d1\u9519\u8bef\u3002<\/p>\nfilter()<\/code>\u51fd\u6570\u4ece\u5b57\u5178\u4e2d\u63d0\u53d6\u7279\u5b9a\u6761\u4ef6\u7684\u503c\uff1f<\/strong>
\u4f7f\u7528filter()<\/code>\u51fd\u6570\u7ed3\u5408\u4e00\u4e2alambda\u8868\u8fbe\u5f0f\uff0c\u53ef\u4ee5\u4ece\u5b57\u5178\u4e2d\u63d0\u53d6\u7b26\u5408\u7279\u5b9a\u6761\u4ef6\u7684\u503c\u3002\u5047\u8bbe\u6709\u4e00\u4e2a\u5b57\u5178my_dict = {'a': 1, 'b': 2, 'c': 3}<\/code>\uff0c\u5982\u679c\u4f60\u60f3\u63d0\u53d6\u6240\u6709\u503c\u5927\u4e8e1\u7684\u9879\uff0c\u53ef\u4ee5\u4f7f\u7528filtered_values = dict(filter(lambda item: item[1] > 1, my_dict.items()))<\/code>\u3002\u8fd9\u5c06\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684\u5b57\u5178\uff0c\u5305\u542b\u7b26\u5408\u6761\u4ef6\u7684\u952e\u503c\u5bf9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"Python\u5982\u4f55\u4ece\u5b57\u5178\u4e2d\u53d6\u591a\u4e2a\u503c\uff1a\u901a\u8fc7\u952e\u5217\u8868\u53d6\u503c\u3001\u4f7f\u7528\u5b57\u5178\u63a8\u5bfc\u5f0f\u3001\u4f7f\u7528map\u51fd\u6570\u3002\u4ece\u5b57\u5178\u4e2d\u53d6\u591a\u4e2a\u503c\u65f6\uff0c\u6211\u4eec\u53ef\u4ee5 […]","protected":false},"author":3,"featured_media":1094540,"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\/1094530"}],"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=1094530"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1094530\/revisions"}],"predecessor-version":[{"id":1094542,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1094530\/revisions\/1094542"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1094540"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1094530"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1094530"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1094530"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}