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Browse files- .gitattributes +1 -0
- bike_availability_model.pkl +3 -0
- final_merged_data.csv +3 -0
- ml.ipynb +0 -0
- model_features.pkl +3 -0
- readme.md +58 -0
.gitattributes
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*.zst filter=lfs diff=lfs merge=lfs -text
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*.zip filter=lfs diff=lfs merge=lfs -text
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*.zst filter=lfs diff=lfs merge=lfs -text
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*tfevents* filter=lfs diff=lfs merge=lfs -text
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final_merged_data.csv filter=lfs diff=lfs merge=lfs -text
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bike_availability_model.pkl
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version https://git-lfs.github.com/spec/v1
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oid sha256:3f35db45557165fd04a9330de819546428212d56558685173282fc1b266a01be
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size 874386885
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final_merged_data.csv
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version https://git-lfs.github.com/spec/v1
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oid sha256:b58ea5664de05d3e0959d60b5c1f828dfff1b859fe27bd09504c8cf96fbce1f1
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size 105941947
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ml.ipynb
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model_features.pkl
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version https://git-lfs.github.com/spec/v1
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oid sha256:112d350224a478b33bec0fe3a69bb4b3606b0dc983fa24285d5feb2c67a1cbaa
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size 140
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readme.md
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## `.pkl` 文件是什么?
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PKL = Pickle,是 Python 的一种序列化格式。
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简单理解:就是把一个 Python 对象(比如训练好的模型)**"冷冻"保存**到硬盘上,
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需要的时候再**"解冻"**加载回来,完全不需要重新训练。
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---
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## 两个文件分别存了什么?
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### `bike_availability_model.pkl`
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- 存储了训练好的 Random Forest 模型
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- 包含所有学习到的决策树、权重等信息
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- 加载后可以直接调用 `.predict()` 进行预测
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### `model_features.pkl`
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- 存储了特征列表:`['station_id', 'capacity', 'lat', 'lon', 'hour', 'day', 'day_of_week', 'is_weekend', 'avg_temperature', 'avg_humidity', 'avg_pressure']`
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- 确保预测时特征的**顺序和名称**与训练时完全一致
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- 顺序错了预测结果就会出错
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---
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## 如何在 Flask 中使用?
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```python
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import pickle
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import pandas as pd
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# 1. 加载模型和特征列表(Flask启动时执行一次)
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with open('bike_availability_model.pkl', 'rb') as f:
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model = pickle.load(f)
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with open('model_features.pkl', 'rb') as f:
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features = pickle.load(f)
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# 2. 预测时使用
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def predict_bikes(station_id, capacity, lat, lon,
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hour, day, day_of_week, is_weekend,
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avg_temperature, avg_humidity, avg_pressure):
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# 构造输入数据,顺序必须与features一致
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input_data = pd.DataFrame([{
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'station_id': station_id,
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'capacity': capacity,
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'lat': lat,
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'lon': lon,
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'hour': hour,
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'day': day,
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'day_of_week': day_of_week,
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'is_weekend': is_weekend,
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'avg_temperature': avg_temperature,
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'avg_humidity': avg_humidity,
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'avg_pressure': avg_pressure
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}])[features] # 用features确保列顺序正确
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prediction = model.predict(input_data)
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return int(round(prediction[0]))
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```
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