{"id":53436,"date":"2025-08-12T11:21:01","date_gmt":"2025-08-12T03:21:01","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/53436.html"},"modified":"2025-08-12T11:21:01","modified_gmt":"2025-08-12T03:21:01","slug":"%e5%9f%ba%e4%ba%8eflask%e7%9a%84%e6%b7%b1%e5%ba%a6%e5%ad%a6%e4%b9%a0%e6%a8%a1%e5%9e%8b%e9%83%a8%e7%bd%b2%e6%8a%80%e6%9c%af%e6%96%87%e6%a1%a3","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/53436.html","title":{"rendered":"\u57fa\u4e8eFlask\u7684\u6df1\u5ea6\u5b66\u4e60\u6a21\u578b\u90e8\u7f72\u6280\u672f\u6587\u6863"},"content":{"rendered":"<h2>\u57fa\u4e8eFlask\u7684\u6df1\u5ea6\u5b66\u4e60\u6a21\u578b\u90e8\u7f72\u6280\u672f\u6587\u6863<\/h2>\n<h3>1. \u6982\u8ff0<\/h3>\n<p>\u672c\u6587\u6863\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528Flask\u6846\u67b6\u90e8\u7f72\u6df1\u5ea6\u5b66\u4e60\u6a21\u578b&#xff0c;\u5b9e\u73b0\u4e00\u4e2a\u5b8c\u6574\u7684Web\u670d\u52a1\u3002Flask\u662f\u4e00\u4e2a\u8f7b\u91cf\u7ea7\u7684Python Web\u6846\u67b6&#xff0c;\u975e\u5e38\u9002\u5408\u5feb\u901f\u6784\u5efaRESTful API\u670d\u52a1&#xff0c;\u5c06\u8bad\u7ec3\u597d\u7684\u6df1\u5ea6\u5b66\u4e60\u6a21\u578b\u63d0\u4f9b\u7ed9\u5ba2\u6237\u7aef\u8c03\u7528\u3002<\/p>\n<h3>2. \u7cfb\u7edf\u67b6\u6784<\/h3>\n<p>\u5ba2\u6237\u7aef (Web\/App)&lt;&#8211; HTTP\/HTTPS &#8211;&gt;Flask Web\u670d\u52a1&lt;&#8211;&gt;\u6df1\u5ea6\u5b66\u4e60\u6a21\u578b<br \/>\n(REST API)<\/p>\n<h3>3. \u73af\u5883\u51c6\u5907<\/h3>\n<h4>3.1 \u8f6f\u4ef6\u4f9d\u8d56<\/h4>\n<ul>\n<li>Python 3.6&#043;<\/li>\n<li>Flask 2.0&#043;<\/li>\n<li>\u6df1\u5ea6\u5b66\u4e60\u6846\u67b6 (PyTorch\/TensorFlow\/Keras\u7b49)<\/li>\n<li>\u5176\u4ed6\u4f9d\u8d56\u5e93: numpy, pillow, opencv-python\u7b49<\/li>\n<\/ul>\n<h4>3.2 \u5b89\u88c5<\/h4>\n<p>pip <span class=\"token function\">install<\/span> flask torch torchvision pillow<\/p>\n<h3>4. \u9879\u76ee\u7ed3\u6784<\/h3>\n<p>project\/<br \/>\n\u251c\u2500\u2500 app.py# Flask\u4e3b\u5e94\u7528<br \/>\n\u251c\u2500\u2500 model\/# \u6a21\u578b\u76ee\u5f55<br \/>\n\u2502\u251c\u2500\u2500 model_weights.pth # \u6a21\u578b\u6743\u91cd<br \/>\n\u2502\u2514\u2500\u2500 model.py# \u6a21\u578b\u5b9a\u4e49<br \/>\n\u251c\u2500\u2500 static\/# \u9759\u6001\u6587\u4ef6<br \/>\n\u251c\u2500\u2500 templates\/# \u6a21\u677f\u6587\u4ef6<br \/>\n\u251c\u2500\u2500 utils\/# \u5de5\u5177\u51fd\u6570<br \/>\n\u2502\u2514\u2500\u2500 preprocess.py# \u6570\u636e\u9884\u5904\u7406<br \/>\n\u2514\u2500\u2500 requirements.txt# \u4f9d\u8d56\u5217\u8868<\/p>\n<h3>5. Flask\u5e94\u7528\u5b9e\u73b0<\/h3>\n<h4>5.1 \u57fa\u672cFlask\u5e94\u7528<\/h4>\n<p><span class=\"token keyword\">from<\/span> flask <span class=\"token keyword\">import<\/span> Flask<span class=\"token punctuation\">,<\/span> request<span class=\"token punctuation\">,<\/span> jsonify<\/p>\n<p>app <span class=\"token operator\">&#061;<\/span> Flask<span class=\"token punctuation\">(<\/span>__name__<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token decorator annotation punctuation\">&#064;app<span class=\"token punctuation\">.<\/span>route<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\/&#039;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">def<\/span> <span class=\"token function\">home<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n<span class=\"token keyword\">return<\/span> <span class=\"token string\">&#034;Deep Learning Model Serving API&#034;<\/span><\/p>\n<p><span class=\"token keyword\">if<\/span> __name__ <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token string\">&#039;__main__&#039;<\/span><span class=\"token punctuation\">:<\/span><br \/>\napp<span class=\"token punctuation\">.<\/span>run<span class=\"token punctuation\">(<\/span>host<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#039;0.0.0.0&#039;<\/span><span class=\"token punctuation\">,<\/span> port<span class=\"token operator\">&#061;<\/span><span class=\"token number\">5000<\/span><span class=\"token punctuation\">,<\/span> debug<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">True<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<h4>5.2 \u52a0\u8f7d\u6df1\u5ea6\u5b66\u4e60\u6a21\u578b<\/h4>\n<p><span class=\"token keyword\">import<\/span> torch<br \/>\n<span class=\"token keyword\">from<\/span> model<span class=\"token punctuation\">.<\/span>model <span class=\"token keyword\">import<\/span> MyModel<\/p>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">load_model<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\nmodel <span class=\"token operator\">&#061;<\/span> MyModel<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\nmodel<span class=\"token punctuation\">.<\/span>load_state_dict<span class=\"token punctuation\">(<\/span>torch<span class=\"token punctuation\">.<\/span>load<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;model\/model_weights.pth&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\nmodel<span class=\"token punctuation\">.<\/span><span class=\"token builtin\">eval<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token comment\"># \u8bbe\u7f6e\u4e3a\u8bc4\u4f30\u6a21\u5f0f<\/span><br \/>\n<span class=\"token keyword\">return<\/span> model<\/p>\n<p>model <span class=\"token operator\">&#061;<\/span> load_model<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<h4>5.3 \u9884\u6d4bAPI\u7aef\u70b9<\/h4>\n<p><span class=\"token keyword\">from<\/span> utils<span class=\"token punctuation\">.<\/span>preprocess <span class=\"token keyword\">import<\/span> preprocess_image<br \/>\n<span class=\"token keyword\">from<\/span> werkzeug<span class=\"token punctuation\">.<\/span>utils <span class=\"token keyword\">import<\/span> secure_filename<br \/>\n<span class=\"token keyword\">import<\/span> os<\/p>\n<p>UPLOAD_FOLDER <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#039;static\/uploads&#039;<\/span><br \/>\nALLOWED_EXTENSIONS <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token string\">&#039;png&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;jpg&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;jpeg&#039;<\/span><span class=\"token punctuation\">}<\/span><\/p>\n<p>app<span class=\"token punctuation\">.<\/span>config<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;UPLOAD_FOLDER&#039;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> UPLOAD_FOLDER<\/p>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">allowed_file<\/span><span class=\"token punctuation\">(<\/span>filename<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n<span class=\"token keyword\">return<\/span> <span class=\"token string\">&#039;.&#039;<\/span> <span class=\"token keyword\">in<\/span> filename <span class=\"token keyword\">and<\/span> \\\\<br \/>\nfilename<span class=\"token punctuation\">.<\/span>rsplit<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;.&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>lower<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">in<\/span> ALLOWED_EXTENSIONS<\/p>\n<p><span class=\"token decorator annotation punctuation\">&#064;app<span class=\"token punctuation\">.<\/span>route<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\/predict&#039;<\/span><span class=\"token punctuation\">,<\/span> methods<span class=\"token operator\">&#061;<\/span><span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;POST&#039;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">def<\/span> <span class=\"token function\">predict<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token string\">&#039;file&#039;<\/span> <span class=\"token keyword\">not<\/span> <span class=\"token keyword\">in<\/span> request<span class=\"token punctuation\">.<\/span>files<span class=\"token punctuation\">:<\/span><br \/>\n<span class=\"token keyword\">return<\/span> jsonify<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">{<\/span><span class=\"token string\">&#039;error&#039;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#039;No file uploaded&#039;<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">400<\/span><\/p>\n<p><span class=\"token builtin\">file<\/span> <span class=\"token operator\">&#061;<\/span> request<span class=\"token punctuation\">.<\/span>files<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;file&#039;<\/span><span class=\"token punctuation\">]<\/span><\/p>\n<p><span class=\"token keyword\">if<\/span> <span class=\"token builtin\">file<\/span><span class=\"token punctuation\">.<\/span>filename <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token string\">&#039;&#039;<\/span><span class=\"token punctuation\">:<\/span><br \/>\n<span class=\"token keyword\">return<\/span> jsonify<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">{<\/span><span class=\"token string\">&#039;error&#039;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#039;No selected file&#039;<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">400<\/span><\/p>\n<p><span class=\"token keyword\">if<\/span> <span class=\"token builtin\">file<\/span> <span class=\"token keyword\">and<\/span> allowed_file<span class=\"token punctuation\">(<\/span><span class=\"token builtin\">file<\/span><span class=\"token punctuation\">.<\/span>filename<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\nfilename <span class=\"token operator\">&#061;<\/span> secure_filename<span class=\"token punctuation\">(<\/span><span class=\"token builtin\">file<\/span><span class=\"token punctuation\">.<\/span>filename<span class=\"token punctuation\">)<\/span><br \/>\nfilepath <span class=\"token operator\">&#061;<\/span> os<span class=\"token punctuation\">.<\/span>path<span class=\"token punctuation\">.<\/span>join<span class=\"token punctuation\">(<\/span>app<span class=\"token punctuation\">.<\/span>config<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;UPLOAD_FOLDER&#039;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> filename<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token builtin\">file<\/span><span class=\"token punctuation\">.<\/span>save<span class=\"token punctuation\">(<\/span>filepath<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u9884\u5904\u7406\u56fe\u50cf<\/span><br \/>\ninput_tensor <span class=\"token operator\">&#061;<\/span> preprocess_image<span class=\"token punctuation\">(<\/span>filepath<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u6267\u884c\u9884\u6d4b<\/span><br \/>\n<span class=\"token keyword\">with<\/span> torch<span class=\"token punctuation\">.<\/span>no_grad<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\noutput <span class=\"token operator\">&#061;<\/span> model<span class=\"token punctuation\">(<\/span>input_tensor<span class=\"token punctuation\">)<\/span><br \/>\nprediction <span class=\"token operator\">&#061;<\/span> output<span class=\"token punctuation\">.<\/span>argmax<span class=\"token punctuation\">(<\/span>dim<span class=\"token operator\">&#061;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span>item<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token keyword\">return<\/span> jsonify<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token string\">&#039;prediction&#039;<\/span><span class=\"token punctuation\">:<\/span> prediction<span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token string\">&#039;image_url&#039;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string-interpolation\"><span class=\"token string\">f&#039;\/static\/uploads\/<\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>filename<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#039;<\/span><\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token keyword\">return<\/span> jsonify<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">{<\/span><span class=\"token string\">&#039;error&#039;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#039;File type not allowed&#039;<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">400<\/span><\/p>\n<h3>6. \u6a21\u578b\u9884\u5904\u7406\u548c\u540e\u5904\u7406<\/h3>\n<h4>6.1 \u9884\u5904\u7406\u793a\u4f8b (preprocess.py)<\/h4>\n<p><span class=\"token keyword\">from<\/span> PIL <span class=\"token keyword\">import<\/span> Image<br \/>\n<span class=\"token keyword\">import<\/span> torchvision<span class=\"token punctuation\">.<\/span>transforms <span class=\"token keyword\">as<\/span> transforms<br \/>\n<span class=\"token keyword\">import<\/span> numpy <span class=\"token keyword\">as<\/span> np<\/p>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">preprocess_image<\/span><span class=\"token punctuation\">(<\/span>image_path<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n<span class=\"token comment\"># \u56fe\u50cf\u9884\u5904\u7406\u6d41\u7a0b<\/span><br \/>\ninput_image <span class=\"token operator\">&#061;<\/span> Image<span class=\"token punctuation\">.<\/span><span class=\"token builtin\">open<\/span><span class=\"token punctuation\">(<\/span>image_path<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span>convert<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;RGB&#039;<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>preprocess <span class=\"token operator\">&#061;<\/span> transforms<span class=\"token punctuation\">.<\/span>Compose<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">[<\/span><br \/>\ntransforms<span class=\"token punctuation\">.<\/span>Resize<span class=\"token punctuation\">(<\/span><span class=\"token number\">256<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\ntransforms<span class=\"token punctuation\">.<\/span>CenterCrop<span class=\"token punctuation\">(<\/span><span class=\"token number\">224<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\ntransforms<span class=\"token punctuation\">.<\/span>ToTensor<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\ntransforms<span class=\"token punctuation\">.<\/span>Normalize<span class=\"token punctuation\">(<\/span>mean<span class=\"token operator\">&#061;<\/span><span class=\"token punctuation\">[<\/span><span class=\"token number\">0.485<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0.456<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0.406<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span><br \/>\nstd<span class=\"token operator\">&#061;<\/span><span class=\"token punctuation\">[<\/span><span class=\"token number\">0.229<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0.224<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0.225<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>input_tensor <span class=\"token operator\">&#061;<\/span> preprocess<span class=\"token punctuation\">(<\/span>input_image<span class=\"token punctuation\">)<\/span><br \/>\ninput_batch <span class=\"token operator\">&#061;<\/span> input_tensor<span class=\"token punctuation\">.<\/span>unsqueeze<span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token comment\"># \u6dfb\u52a0batch\u7ef4\u5ea6<\/span><\/p>\n<p><span class=\"token keyword\">return<\/span> input_batch<\/p>\n<h4>6.2 \u540e\u5904\u7406\u793a\u4f8b<\/h4>\n<p><span class=\"token comment\"># \u5728predict\u51fd\u6570\u4e2d\u6dfb\u52a0\u540e\u5904\u7406<\/span><br \/>\nclass_names <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;cat&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;dog&#039;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token comment\"># \u793a\u4f8b\u7c7b\u522b<\/span><\/p>\n<p><span class=\"token decorator annotation punctuation\">&#064;app<span class=\"token punctuation\">.<\/span>route<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\/predict&#039;<\/span><span class=\"token punctuation\">,<\/span> methods<span class=\"token operator\">&#061;<\/span><span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;POST&#039;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">def<\/span> <span class=\"token function\">predict<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n<span class=\"token comment\"># &#8230;\u4e4b\u524d\u7684\u4ee3\u7801&#8230;<\/span><\/p>\n<p><span class=\"token keyword\">with<\/span> torch<span class=\"token punctuation\">.<\/span>no_grad<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\noutput <span class=\"token operator\">&#061;<\/span> model<span class=\"token punctuation\">(<\/span>input_tensor<span class=\"token punctuation\">)<\/span><br \/>\nprobabilities <span class=\"token operator\">&#061;<\/span> torch<span class=\"token punctuation\">.<\/span>nn<span class=\"token punctuation\">.<\/span>functional<span class=\"token punctuation\">.<\/span>softmax<span class=\"token punctuation\">(<\/span>output<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> dim<span class=\"token operator\">&#061;<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\ntop_prob<span class=\"token punctuation\">,<\/span> top_catid <span class=\"token operator\">&#061;<\/span> torch<span class=\"token punctuation\">.<\/span>topk<span class=\"token punctuation\">(<\/span>probabilities<span class=\"token punctuation\">,<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>results <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><br \/>\n<span class=\"token keyword\">for<\/span> i <span class=\"token keyword\">in<\/span> <span class=\"token builtin\">range<\/span><span class=\"token punctuation\">(<\/span>top_prob<span class=\"token punctuation\">.<\/span>size<span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\nresults<span class=\"token punctuation\">.<\/span>append<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token string\">&#039;class&#039;<\/span><span class=\"token punctuation\">:<\/span> class_names<span class=\"token punctuation\">[<\/span>top_catid<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token string\">&#039;probability&#039;<\/span><span class=\"token punctuation\">:<\/span> top_prob<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>item<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token keyword\">return<\/span> jsonify<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token string\">&#039;predictions&#039;<\/span><span class=\"token punctuation\">:<\/span> results<span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token string\">&#039;image_url&#039;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string-interpolation\"><span class=\"token string\">f&#039;\/static\/uploads\/<\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>filename<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#039;<\/span><\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<h3>7. \u6027\u80fd\u4f18\u5316<\/h3>\n<h4>7.1 \u542f\u7528\u591a\u7ebf\u7a0b<\/h4>\n<p><span class=\"token keyword\">if<\/span> __name__ <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token string\">&#039;__main__&#039;<\/span><span class=\"token punctuation\">:<\/span><br \/>\napp<span class=\"token punctuation\">.<\/span>run<span class=\"token punctuation\">(<\/span>host<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#039;0.0.0.0&#039;<\/span><span class=\"token punctuation\">,<\/span> port<span class=\"token operator\">&#061;<\/span><span class=\"token number\">5000<\/span><span class=\"token punctuation\">,<\/span> threaded<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">True<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<h4>7.2 \u4f7f\u7528\u751f\u4ea7\u670d\u52a1\u5668<\/h4>\n<p><span class=\"token comment\"># \u4f7f\u7528Waitress<\/span><br \/>\npip <span class=\"token function\">install<\/span> waitress<br \/>\nwaitress-serve <span class=\"token parameter variable\">&#8211;host<\/span><span class=\"token operator\">&#061;<\/span><span class=\"token number\">0.0<\/span>.0.0 <span class=\"token parameter variable\">&#8211;port<\/span><span class=\"token operator\">&#061;<\/span><span class=\"token number\">5000<\/span> app:app<\/p>\n<p><span class=\"token comment\"># \u6216\u4f7f\u7528Gunicorn<\/span><br \/>\npip <span class=\"token function\">install<\/span> gunicorn<br \/>\ngunicorn <span class=\"token parameter variable\">-w<\/span> <span class=\"token number\">4<\/span> <span class=\"token parameter variable\">-b<\/span> <span class=\"token number\">0.0<\/span>.0.0:5000 app:app<\/p>\n<h4>7.3 \u6a21\u578b\u7f13\u5b58<\/h4>\n<p><span class=\"token keyword\">from<\/span> flask <span class=\"token keyword\">import<\/span> Flask<span class=\"token punctuation\">,<\/span> g<br \/>\n<span class=\"token keyword\">import<\/span> functools<\/p>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">get_model<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token string\">&#039;model&#039;<\/span> <span class=\"token keyword\">not<\/span> <span class=\"token keyword\">in<\/span> g<span class=\"token punctuation\">:<\/span><br \/>\ng<span class=\"token punctuation\">.<\/span>model <span class=\"token operator\">&#061;<\/span> load_model<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">return<\/span> g<span class=\"token punctuation\">.<\/span>model<\/p>\n<p><span class=\"token decorator annotation punctuation\">&#064;app<span class=\"token punctuation\">.<\/span>teardown_appcontext<\/span><br \/>\n<span class=\"token keyword\">def<\/span> <span class=\"token function\">teardown_model<\/span><span class=\"token punctuation\">(<\/span>exception<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\nmodel <span class=\"token operator\">&#061;<\/span> g<span class=\"token punctuation\">.<\/span>pop<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;model&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token boolean\">None<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">if<\/span> model <span class=\"token keyword\">is<\/span> <span class=\"token keyword\">not<\/span> <span class=\"token boolean\">None<\/span><span class=\"token punctuation\">:<\/span><br \/>\n<span class=\"token comment\"># \u5982\u679c\u6709\u9700\u8981\u53ef\u4ee5\u5728\u8fd9\u91cc\u6e05\u7406\u6a21\u578b\u8d44\u6e90<\/span><br \/>\n<span class=\"token keyword\">pass<\/span><\/p>\n<h3>8. \u5b89\u5168\u8003\u8651<\/h3>\n<h4>8.1 \u6587\u4ef6\u4e0a\u4f20\u5b89\u5168<\/h4>\n<p><span class=\"token comment\"># \u5728\u6587\u4ef6\u4e0a\u4f20\u5904\u7406\u4e2d\u6dfb\u52a0\u5b89\u5168\u68c0\u67e5<\/span><br \/>\n<span class=\"token keyword\">import<\/span> magic<\/p>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">is_valid_image<\/span><span class=\"token punctuation\">(<\/span>file_stream<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n<span class=\"token comment\"># \u4f7f\u7528python-magic\u68c0\u67e5\u6587\u4ef6\u5b9e\u9645\u7c7b\u578b<\/span><br \/>\nfile_type <span class=\"token operator\">&#061;<\/span> magic<span class=\"token punctuation\">.<\/span>from_buffer<span class=\"token punctuation\">(<\/span>file_stream<span class=\"token punctuation\">.<\/span>read<span class=\"token punctuation\">(<\/span><span class=\"token number\">1024<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> mime<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">True<\/span><span class=\"token punctuation\">)<\/span><br \/>\nfile_stream<span class=\"token punctuation\">.<\/span>seek<span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">return<\/span> file_type <span class=\"token keyword\">in<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;image\/jpeg&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;image\/png&#039;<\/span><span class=\"token punctuation\">]<\/span><\/p>\n<h4>8.2 API\u8ba4\u8bc1<\/h4>\n<p><span class=\"token keyword\">from<\/span> functools <span class=\"token keyword\">import<\/span> wraps<br \/>\n<span class=\"token keyword\">from<\/span> flask <span class=\"token keyword\">import<\/span> request<span class=\"token punctuation\">,<\/span> jsonify<\/p>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">token_required<\/span><span class=\"token punctuation\">(<\/span>f<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n<span class=\"token decorator annotation punctuation\">&#064;wraps<\/span><span class=\"token punctuation\">(<\/span>f<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">def<\/span> <span class=\"token function\">decorated<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>args<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">**<\/span>kwargs<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\ntoken <span class=\"token operator\">&#061;<\/span> request<span class=\"token punctuation\">.<\/span>headers<span class=\"token punctuation\">.<\/span>get<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;X-API-Key&#039;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token keyword\">not<\/span> token <span class=\"token keyword\">or<\/span> token <span class=\"token operator\">!&#061;<\/span> <span class=\"token string\">&#039;your-secret-token&#039;<\/span><span class=\"token punctuation\">:<\/span><br \/>\n<span class=\"token keyword\">return<\/span> jsonify<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">{<\/span><span class=\"token string\">&#039;message&#039;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#039;Token is missing or invalid&#039;<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">401<\/span><br \/>\n<span class=\"token keyword\">return<\/span> f<span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>args<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">**<\/span>kwargs<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">return<\/span> decorated<\/p>\n<p><span class=\"token decorator annotation punctuation\">&#064;app<span class=\"token punctuation\">.<\/span>route<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\/predict&#039;<\/span><span class=\"token punctuation\">,<\/span> methods<span class=\"token operator\">&#061;<\/span><span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;POST&#039;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token decorator annotation punctuation\">&#064;token_required<\/span><br \/>\n<span class=\"token keyword\">def<\/span> <span class=\"token function\">predict<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n<span class=\"token comment\"># \u53d7\u4fdd\u62a4\u7684\u9884\u6d4b\u7aef\u70b9<\/span><br \/>\n<span class=\"token keyword\">pass<\/span><\/p>\n<h3>9. \u6d4b\u8bd5API<\/h3>\n<p>\u4f7f\u7528curl\u6d4b\u8bd5API:<\/p>\n<p><span class=\"token function\">curl<\/span> <span class=\"token parameter variable\">-X<\/span> POST <span class=\"token parameter variable\">-F<\/span> <span class=\"token string\">&#034;file&#061;&#064;test.jpg&#034;<\/span> http:\/\/localhost:5000\/predict<\/p>\n<p>\u4f7f\u7528Python requests\u6d4b\u8bd5:<\/p>\n<p><span class=\"token keyword\">import<\/span> requests<\/p>\n<p>url <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#039;http:\/\/localhost:5000\/predict&#039;<\/span><br \/>\nfiles <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token string\">&#039;file&#039;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">open<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;test.jpg&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;rb&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">}<\/span><br \/>\nresponse <span class=\"token operator\">&#061;<\/span> requests<span class=\"token punctuation\">.<\/span>post<span class=\"token punctuation\">(<\/span>url<span class=\"token punctuation\">,<\/span> files<span class=\"token operator\">&#061;<\/span>files<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>response<span class=\"token punctuation\">.<\/span>json<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<h3>10. \u90e8\u7f72\u5efa\u8bae<\/h3>\n<li>\u4f7f\u7528Nginx\u4f5c\u4e3a\u53cd\u5411\u4ee3\u7406&#xff1a;\u5904\u7406\u9759\u6001\u6587\u4ef6\u548c\u8d1f\u8f7d\u5747\u8861<\/li>\n<li>\u4f7f\u7528Docker\u5bb9\u5668\u5316&#xff1a;\u786e\u4fdd\u73af\u5883\u4e00\u81f4\u6027<\/li>\n<li>\u76d1\u63a7\u548c\u65e5\u5fd7&#xff1a;\u6dfb\u52a0\u5e94\u7528\u6027\u80fd\u76d1\u63a7\u548c\u65e5\u5fd7\u8bb0\u5f55<\/li>\n<li>\u81ea\u52a8\u6269\u5c55&#xff1a;\u6839\u636e\u8d1f\u8f7d\u81ea\u52a8\u6269\u5c55\u670d\u52a1\u5b9e\u4f8b<\/li>\n<h3>11. \u5e38\u89c1\u95ee\u9898\u89e3\u51b3<\/h3>\n<li>\u5185\u5b58\u6cc4\u6f0f&#xff1a;\u786e\u4fdd\u5728\u9884\u6d4b\u540e\u91ca\u653e\u8d44\u6e90<\/li>\n<li>GPU\u5185\u5b58\u4e0d\u8db3&#xff1a;\u9650\u5236\u5e76\u53d1\u8bf7\u6c42\u6216\u4f7f\u7528\u6279\u5904\u7406<\/li>\n<li>\u957f\u54cd\u5e94\u65f6\u95f4&#xff1a;\u4f18\u5316\u6a21\u578b\u6216\u6dfb\u52a0\u7f13\u5b58\u5c42<\/li>\n<li>\u8de8\u57df\u95ee\u9898&#xff1a;\u4f7f\u7528Flask-CORS\u6269\u5c55<\/li>\n<h3>12. \u6269\u5c55\u529f\u80fd<\/h3>\n<li>\u6279\u5904\u7406\u652f\u6301&#xff1a;\u540c\u65f6\u5904\u7406\u591a\u4e2a\u8f93\u5165<\/li>\n<li>\u6a21\u578b\u7248\u672c\u63a7\u5236&#xff1a;\u652f\u6301\u591a\u6a21\u578b\u7248\u672c\u5207\u6362<\/li>\n<li>\u5f02\u6b65\u5904\u7406&#xff1a;\u4f7f\u7528Celery\u5904\u7406\u957f\u65f6\u95f4\u4efb\u52a1<\/li>\n<li>Swagger\u6587\u6863&#xff1a;\u4f7f\u7528Flask-RESTPlus\u751f\u6210API\u6587\u6863<\/li>\n<hr 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