From 1aef8141f0adc9145c47f99e0a04829886e80064 Mon Sep 17 00:00:00 2001
From: huzhiqiang <912790387@qq.com>
Date: Tue, 14 Jul 2020 10:42:04 +0800
Subject: [PATCH] [Doc]Update python doc #3932

---
 docs/demo_guides/python_demo.md | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/docs/demo_guides/python_demo.md b/docs/demo_guides/python_demo.md
index d6a7b15bd9..59f81783c0 100644
--- a/docs/demo_guides/python_demo.md
+++ b/docs/demo_guides/python_demo.md
@@ -86,19 +86,28 @@ config.set_model_from_file(/YOU_MODEL_PATH/mobilenet_v1_opt.nb)
 predictor = create_paddle_predictor(config)
 ```
 
-(3) 设置输入数据
+(3) 从图片读入数据
+
+```python
+image = Image.open('./example.jpg')
+resized_image = image.resize((224, 224), Image.BILINEAR)
+image_data = np.array(resized_image).flatten().tolist()
+```
+
+(4) 设置输入数据
+
 ```python
 input_tensor = predictor.get_input(0)
 input_tensor.resize([1, 3, 224, 224])
-input_tensor.set_float_data([1.] * 3 * 224 * 224)
+input_tensor.set_float_data(image_data)
 ```
 
-(4) 执行预测
+(5) 执行预测
 ```python
 predictor.run()
 ```
 
-(5) 得到输出数据
+(6) 得到输出数据
 ```python
 output_tensor = predictor.get_output(0)
 print(output_tensor.shape())
-- 
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