Model training

Dockerfile

@@ -9,11 +9,12 @@ ENV IS_DOCKER=True
 WORKDIR /app
 COPY ./download_data.sh calc_stats.sh ./
 COPY ./clean_and_split_data.py calc_stats.py ./
+COPY ./train_model.py ./
 
 RUN apt-get update && apt-get install -y python3-pip unzip && rm -rf /var/lib/apt/lists/*
 
 RUN export PATH="$PATH:/root/.local/bin"
 
-RUN pip3 install kaggle pandas scikit-learn
+RUN pip3 install kaggle pandas scikit-learn tensorflow
 
 RUN mkdir /.kaggle && chmod o+w /.kaggle

train_model.py

@@ -0,0 +1,80 @@
+import pandas as pd
+from sklearn.preprocessing import LabelEncoder
+from keras.models import Sequential
+from keras.layers import Dense
+import tensorflow as tf
+import numpy as np
+
+
+tf.config.set_visible_devices([], 'GPU')
+
+# Read and split data
+train_data = pd.read_csv("crime_train.csv")
+val_data = pd.read_csv("crime_dev.csv")
+test_data = pd.read_csv("crime_test.csv")
+
+x_columns = ["DISTRICT", "STREET", "YEAR", "MONTH", "DAY_OF_WEEK", "HOUR", "Lat", "Long"]
+y_column = "OFFENSE_CODE_GROUP"
+
+x_train = train_data[x_columns]
+y_train = train_data[y_column]
+x_val = val_data[x_columns]
+y_val = val_data[y_column]
+x_test = test_data[x_columns]
+y_test = test_data[y_column]
+
+num_categories = len(y_train.unique())
+num_features = len(x_columns)
+
+# Train label encoders for categorical data
+encoder_y = LabelEncoder()
+encoder_day = LabelEncoder()
+encoder_dist = LabelEncoder()
+encoder_street = LabelEncoder()
+encoder_y.fit(y_train)
+encoder_day.fit(x_train["DAY_OF_WEEK"])
+encoder_dist.fit(x_train["DISTRICT"])
+encoder_street.fit(pd.concat([x_val["STREET"], x_test["STREET"], x_train["STREET"]], axis=0))
+
+
+# Encode train categorical data
+y_train = encoder_y.transform(y_train)
+x_train["DAY_OF_WEEK"] = encoder_day.transform(x_train["DAY_OF_WEEK"])
+x_train["DISTRICT"] = encoder_dist.transform(x_train["DISTRICT"])
+x_train["STREET"] = encoder_street.transform(x_train["STREET"])
+
+# Encode train categorical data
+y_val = encoder_y.transform(y_val)
+x_val["DAY_OF_WEEK"] = encoder_day.transform(x_val["DAY_OF_WEEK"])
+x_val["DISTRICT"] = encoder_dist.transform(x_val["DISTRICT"])
+x_val["STREET"] = encoder_street.transform(x_val["STREET"])
+
+# Encode train categorical data
+y_test = encoder_y.transform(y_test)
+x_test["DAY_OF_WEEK"] = encoder_day.transform(x_test["DAY_OF_WEEK"])
+x_test["DISTRICT"] = encoder_dist.transform(x_test["DISTRICT"])
+x_test["STREET"] = encoder_street.transform(x_test["STREET"])
+
+# Define model
+model = Sequential()
+model.add(Dense(32, activation='relu', input_dim=num_features))
+model.add(Dense(64, activation='relu'))
+model.add(Dense(128, activation='relu'))
+model.add(Dense(num_categories, activation='softmax'))
+model.compile(optimizer='adam', loss='sparse_categorical_crossentropy', metrics=['accuracy', 'sparse_categorical_accuracy'])
+
+# Train model
+model.fit(x_train, y_train, epochs=100, validation_data=(x_val, y_val))
+
+# Make predictions
+y_pred = model.predict(x_test)
+output = [np.argmax(pred) for pred in y_pred]
+output_text = encoder_y.inverse_transform(list(output))
+
+# Save predictions
+data_to_save = pd.concat([test_data[x_columns], test_data[y_column]], axis = 1)
+data_to_save["PREDICTED"] = output_text
+data_to_save.to_csv("out.csv")
+
+# Save model
+model.save("model")