Create app.py

app.py

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+import streamlit as st
+import joblib
+import pandas as pd
+import numpy as np
+import plotly.graph_objects as go
+from PIL import Image
+import time
+import matplotlib.pyplot as plt
+import qrcode
+from io import BytesIO
+import csv
+
+# Load the trained models and transformers
+num_imputer = joblib.load('numerical_imputer.joblib')
+cat_imputer = joblib.load('cat_imputer.joblib')
+encoder = joblib.load('encoder.joblib')
+scaler = joblib.load('scaler.joblib')
+model1 = joblib.load('lr_model_vif_smote.joblib')
+model2 = joblib.load('gb_model_vif_smote.joblib')
+
+
+def preprocess_input(input_data):
+    input_df = pd.DataFrame(input_data, index=[0])
+
+    cat_columns = [col for col in input_df.columns if input_df[col].dtype == 'object']
+    num_columns = [col for col in input_df.columns if input_df[col].dtype != 'object']
+
+    input_df_imputed_cat = cat_imputer.transform(input_df[cat_columns])
+    input_df_imputed_num = num_imputer.transform(input_df[num_columns])
+
+    input_encoded_df = pd.DataFrame(encoder.transform(input_df_imputed_cat).toarray(),
+                                    columns=encoder.get_feature_names_out(cat_columns))
+
+    input_df_scaled = scaler.transform(input_df_imputed_num)
+    input_scaled_df = pd.DataFrame(input_df_scaled, columns=num_columns)
+    final_df = pd.concat([input_encoded_df, input_scaled_df], axis=1)
+    final_df = final_df.reindex(columns=original_feature_names, fill_value=0)
+
+    return final_df
+
+original_feature_names = ['MONTANT', 'FREQUENCE_RECH', 'REVENUE', 'ARPU_SEGMENT', 'FREQUENCE',
+                          'DATA_VOLUME', 'ON_NET', 'ORANGE', 'TIGO', 'ZONE1', 'ZONE2', 'REGULARITY', 'FREQ_TOP_PACK',
+                          'REGION_DAKAR', 'REGION_DIOURBEL', 'REGION_FATICK', 'REGION_KAFFRINE', 'REGION_KAOLACK',
+                          'REGION_KEDOUGOU', 'REGION_KOLDA', 'REGION_LOUGA', 'REGION_MATAM', 'REGION_SAINT-LOUIS',
+                          'REGION_SEDHIOU', 'REGION_TAMBACOUNDA', 'REGION_THIES', 'REGION_ZIGUINCHOR',
+                          'TENURE_Long-term', 'TENURE_Medium-term', 'TENURE_Mid-term', 'TENURE_Short-term',
+                          'TENURE_Very short-term', 'TOP_PACK_data', 'TOP_PACK_international', 'TOP_PACK_messaging',
+                          'TOP_PACK_other_services', 'TOP_PACK_social_media', 'TOP_PACK_value_added_services',
+                          'TOP_PACK_voice']
+
+# Set up the Streamlit app
+st.set_page_config(layout="wide")
+
+# Main page - Churn Prediction
+st.title('📞 EXPRESSO TELECOM CUSTOMER CHURN PREDICTION APP 📞')
+
+# Main page - Churn Prediction
+st.image("banner.png", use_column_width=True)
+st.markdown("This app predicts whether a customer will leave your company ❌ or not 🎉. Enter the details of the customer on the left sidebar to see the result")
+
+
+    # How to use
+st.title('How to Use')
+st.markdown('1. Select your model of choice on the left sidebar.')
+st.markdown('2. Adjust the input parameters based on customer details')
+st.markdown('3. Click the "Predict" button to initiate the prediction.')
+st.markdown('4. The app will simulate a prediction process with a progress bar.')
+st.markdown('5. Once the prediction is complete, the results will be displayed below.')
+
+import csv
+import streamlit as st
+
+# Add context text
+st.sidebar.markdown('**Welcome!**')
+st.sidebar.markdown('This is a work in progress, and we would love to hear your suggestions on how to improve the user experience. Please feel free to provide your feedback in the suggestion box below.')
+
+# Create the sidebar with a text input field for suggestions
+correction_text = st.sidebar.text_input('Enter your suggestion')
+
+# Button to submit the suggestion
+if st.sidebar.button('Submit'):
+    # Perform action on suggestion submission (e.g., save to a CSV file)
+    with open('suggestions.csv', 'a', newline='') as file:
+        writer = csv.writer(file)
+        writer.writerow([correction_text])
+    st.sidebar.info('Suggestion submitted successfully')
+
+# Define a dictionary of models with their names, actual models, and types
+models = {
+    'Logistic Regression': {'model': model1, 'type': 'logistic_regression'},
+    'Gradient Boosting': {'model': model2, 'type': 'gradient_boosting'}
+}
+
+# Allow the user to select a model from the sidebar
+# Allow the user to select a model from the sidebar
+st.sidebar.title('Select Model')
+model_name = st.sidebar.selectbox('Choose a model', list(models.keys()))
+
+# Retrieve the selected model and its type from the dictionary
+model = models[model_name]['model']
+model_type = models[model_name]['type']
+
+
+# Collect input from the user
+st.sidebar.title('Enter Customer Details')
+input_features = {
+    'MONTANT': st.sidebar.number_input('Top-up Amount (MONTANT)'),
+    'FREQUENCE_RECH': st.sidebar.number_input('Number of Times the Customer Refilled (FREQUENCE_RECH)'),
+    'REVENUE': st.sidebar.number_input('Monthly income of the client (REVENUE)'),
+    'ARPU_SEGMENT': st.sidebar.number_input('Income over 90 days / 3 (ARPU_SEGMENT)'),
+    'FREQUENCE': st.sidebar.number_input('Number of times the client has made an income (FREQUENCE)'),
+    'DATA_VOLUME': st.sidebar.number_input('Number of Connections (DATA_VOLUME)'),
+    'ON_NET': st.sidebar.number_input('Inter Expresso Call (ON_NET)'),
+    'ORANGE': st.sidebar.number_input('Call to Orange (ORANGE)'),
+    'TIGO': st.sidebar.number_input('Call to Tigo (TIGO)'),
+    'ZONE1': st.sidebar.number_input('Call to Zone 1 (ZONE1)'),
+    'ZONE2': st.sidebar.number_input('Call to Zone 2 (ZONE2)'),
+    'REGULARITY': st.sidebar.number_input('Number of Times the Client is Active for 90 Days (REGULARITY)'),
+    'FREQ_TOP_PACK': st.sidebar.number_input('Number of Times the Client has Activated the Top Packs (FREQ_TOP_PACK)'),
+    'REGION': st.sidebar.selectbox('Location of Each Client (REGION)', ['SAINT-LOUIS', 'THIES', 'LOUGA', 'MATAM', 'FATICK', 'KAOLACK',
+                                                                        'DIOURBEL', 'TAMBACOUNDA', 'ZIGUINCHOR', 'KOLDA', 'KAFFRINE', 'SEDHIOU',
+                                                                        'KEDOUGOU']),
+    'TENURE': st.sidebar.selectbox('Duration in the Network (TENURE)', ['Short-term', 'Mid-term', 'Medium-term', 'Very short-term']),
+    'TOP_PACK': st.sidebar.selectbox('Most Active Pack (TOP_PACK)', ['data', 'international', 'messaging', 'social_media',
+                                                                      'value_added_services', 'voice'])
+}
+
+# Input validation
+valid_input = True
+error_messages = []
+
+# Validate numeric inputs
+numeric_ranges = {
+    'MONTANT': [0, 1000000],
+    'FREQUENCE_RECH': [0, 100],
+    'REVENUE': [0, 1000000],
+    'ARPU_SEGMENT': [0, 100000],
+    'FREQUENCE': [0, 100],
+    'DATA_VOLUME': [0, 100000],
+    'ON_NET': [0, 100000],
+    'ORANGE': [0, 100000],
+    'TIGO': [0, 100000],
+    'ZONE1': [0, 100000],
+    'ZONE2': [0, 100000],
+    'REGULARITY': [0, 100],
+    'FREQ_TOP_PACK': [0, 100]
+}
+
+for feature, value in input_features.items():
+    range_min, range_max = numeric_ranges.get(feature, [None, None])
+    if range_min is not None and range_max is not None:
+        if not range_min <= value <= range_max:
+            valid_input = False
+            error_messages.append(f"{feature} should be between {range_min} and {range_max}.")
+
+#Churn Prediction
+
+def predict_churn(input_data, model):
+    # Preprocess the input data
+    preprocessed_data = preprocess_input(input_data)
+
+     # Calculate churn probabilities using the model
+    probabilities = model.predict_proba(preprocessed_data)
+
+    # Determine churn labels based on the model type
+    if model_type == "logistic_regression":
+        churn_labels = ["No Churn", "Churn"]
+    elif model_type == "gradient_boosting":
+        churn_labels = ["Churn", "No Churn"]
+    # Extract churn probability for the first sample
+    churn_probability = probabilities[0]
+
+    # Create a dictionary mapping churn labels to their indices
+    churn_indices = {label: idx for idx, label in enumerate(churn_labels)}
+
+    # Determine the index with the highest churn probability
+    churn_index = np.argmax(churn_probability)
+
+    # Return churn labels, churn probabilities, churn indices, and churn index
+    return churn_labels, churn_probability, churn_indices, churn_index
+
+
+# Predict churn based on user input
+if st.sidebar.button('Predict Churn'):
+    try:
+        with st.spinner("Predicting..."):
+        # Simulate a long-running process
+            progress_bar = st.progress(0)
+            step = 20  # A big step will reduce the execution time
+            for i in range(0, 100, step):
+                time.sleep(0.1)
+                progress_bar.progress(i + step)
+
+                #churn_labels, churn_probability = predict_churn(input_features, model)  # Pass model1 or model2 based on the selected model
+        churn_labels, churn_probability, churn_indices, churn_index = predict_churn(input_features, model)
+
+        st.subheader('Main Results')
+
+        col1, col2 = st.columns(2)
+
+        if churn_labels[churn_index] == "Churn":
+            churn_prob = churn_probability[churn_index]
+            with col1:
+                st.error(f"Beware!!! This customer is likely to churn with a probability of {churn_prob * 100:.2f}% 😢")
+                resized_churn_image = Image.open('Churn.png')
+                resized_churn_image = resized_churn_image.resize((350, 300))  # Adjust the width and height as desired
+                st.image(resized_churn_image)
+                # Add suggestions for retaining churned customers in the 'Churn' group
+            with col2:
+                st.info("Suggestions for retaining churned customers in this customer group:\n"
+                    "- Offer personalized discounts or promotions\n"
+                    "- Provide exceptional customer service\n"
+                    "- Introduce loyalty programs\n"
+                    "- Send targeted re-engagement emails\n"
+                    "- Provide a dedicated account manager\n"
+                    "- Offer extended trial periods\n"
+                    "- Conduct exit surveys to understand reasons for churn\n"
+                    "- Implement a customer win-back campaign\n"
+                    "- Provide incentives for referrals\n"
+                    "- Improve product or service offerings based on customer feedback")
+        else:
+            #churn_index = churn_indices["No Churn"]
+            churn_prob = churn_probability[churn_index]
+            with col1:
+                st.success(f"This customer is not likely to churn with a probability of {churn_prob * 100:.2f}% 😀")
+                resized_not_churn_image = Image.open('NotChurn.jpg')
+                resized_not_churn_image = resized_not_churn_image.resize((350, 300))  # Adjust the width and height as desired
+                st.image(resized_not_churn_image)
+                # Add suggestions for retaining churned customers in the 'Churn' group
+            with col2:
+                st.info("Suggestions for retaining non-churned customers in this customer group:\n"
+                    "- Provide personalized product recommendations\n"
+                    "- Offer exclusive features or upgrades\n"
+                    "- Implement proactive customer support\n"
+                    "- Conduct customer satisfaction surveys\n"
+                    "- Recognize and reward loyal customers\n"
+                    "- Organize customer appreciation events\n"
+                    "- Offer early access to new features or products\n"
+                    "- Provide educational resources or tutorials\n"
+                    "- Implement a customer loyalty program\n"
+                    "- Offer flexible billing or pricing options")
+
+        st.subheader('Churn Probability')
+
+        # Create a donut chart to display probabilities
+        fig = go.Figure(data=[go.Pie(
+            labels=churn_labels,
+            values=churn_probability,
+            hole=0.5,
+            textinfo='label+percent',
+            marker=dict(colors=['#FFA07A', '#6495ED', '#FFD700', '#32CD32', '#FF69B4', '#8B008B']))])
+
+        fig.update_traces(
+            hoverinfo='label+percent',
+            textfont_size=12,
+            textposition='inside',
+            texttemplate='%{label}: %{percent:.2f}%'
+            )
+
+        fig.update_layout(
+            title='Churn Probability',
+            title_x=0.5,
+            showlegend=False,
+            width=500,
+            height=500
+            )
+
+        st.plotly_chart(fig, use_container_width=True)
+
+        # Calculate the average churn rate (replace with your actual value)
+
+        st.subheader('Customer Churn Probability Comparison')
+
+        average_churn_rate = 19
+
+        # Convert the overall churn rate to churn probability
+        main_data_churn_probability = average_churn_rate / 100
+
+        # Retrieve the predicted churn probability for the selected customer
+        predicted_churn_prob = churn_probability[churn_index]
+
+        if churn_labels[churn_index] == "Churn":
+            churn_prob = churn_probability[churn_index]
+            # Create a bar chart comparing the churn probability with the average churn rate
+            labels = ['Churn Probability', 'Average Churn Probability']
+            values = [predicted_churn_prob, main_data_churn_probability]
+
+            fig = go.Figure(data=[go.Bar(x=labels, y=values)])
+            fig.update_layout(
+                xaxis_title='Churn Probability',
+                yaxis_title='Probability',
+                title='Comparison with Average Churn Rate',
+                yaxis=dict(range=[0, 1])  # Set the y-axis limits between 0 and 1
+            )
+
+            # Add explanations
+            if predicted_churn_prob > main_data_churn_probability:
+                churn_comparison = "higher"
+            elif predicted_churn_prob < main_data_churn_probability:
+                churn_comparison = "lower"
+            else:
+                churn_comparison = "equal"
+
+
+            explanation = f"This bar chart compares the churn probability of the selected customer " \
+                            f"with the average churn rate of all customers. It provides insights into how the " \
+                            f"individual customer's churn likelihood ({predicted_churn_prob:.2f}) compares to the " \
+                            f"overall trend. The 'Churn Probability' represents the likelihood of churn " \
+                            f"for the selected customer, while the 'Average Churn Rate' represents the average " \
+                            f"churn rate across all customers ({main_data_churn_probability:.2f}).\n\n" \
+                            f"The customer's churn rate is {churn_comparison} than the average churn rate."
+
+            st.plotly_chart(fig)
+            st.write(explanation)
+        else:
+    # Create a bar chart comparing the no-churn probability with the average churn rate
+            labels = ['No-Churn Probability', 'Average Churn Probability']
+            values = [1 - predicted_churn_prob, main_data_churn_probability]
+
+            fig = go.Figure(data=[go.Bar(x=labels, y=values)])
+            fig.update_layout(
+                xaxis_title='Churn Probability',
+                yaxis_title='Probability',
+                title='Comparison with Average Churn Rate',
+                yaxis=dict(range=[0, 1])  # Set the y-axis limits between 0 and 1
+            )
+
+            explanation = f"This bar chart compares the churn probability of the selected customer " \
+              f"with the average churn rate of all customers. It provides insights into how the " \
+              f"individual customer's likelihood of churn ({1 - predicted_churn_prob:.2f}) compares to the " \
+              f"overall trend. A lower churn probability indicates that the customer is less likely to churn. " \
+              f"The chart shows that the churn probability ({1 - predicted_churn_prob:.2f}) is lower than the " \
+              f"average churn probability ({main_data_churn_probability:.2f}), suggesting that the customer " \
+              f"is predicted to stay with the company. Keep in mind that the prediction is based on the " \
+              f"available data and the applied model, and there might still be some uncertainty in the result."
+
+
+            st.plotly_chart(fig)
+            st.write(explanation)
+
+        # Visualize Feature Importance
+
+        st.subheader('Feature Importance')
+        if hasattr(model, 'coef_'):  # Check if the model has attribute 'coef_' to determine importance type
+            feature_importances = model.coef_[0]
+            importance_type = 'Coef'
+        elif hasattr(model, 'feature_importances_'):
+            feature_importances = model.feature_importances_
+            importance_type = 'Importance'
+        else:
+            st.write('Feature importance is not available for this model.')
+
+            # If importance information is available, create a DataFrame and sort it
+        if hasattr(model, 'coef_') or hasattr(model, 'feature_importances_'):
+            importance_df = pd.DataFrame({'Feature': original_feature_names, importance_type: feature_importances})
+            importance_df = importance_df.sort_values(importance_type, ascending=False)
+
+            # Determine color for each bar based on positive or negative importance
+            colors = ['green' if importance > 0 else 'red' for importance in importance_df[importance_type]]
+
+            # Create a horizontal bar chart using Plotly
+            fig = go.Figure(go.Bar(
+                x=importance_df[importance_type],
+                y=importance_df['Feature'],
+                orientation='h',
+                marker=dict(color=colors),
+                text=importance_df[importance_type].apply(lambda x: f'{x:.2f}'),
+                textposition='inside'))
+
+    # Configure the layout of the bar chart
+            fig.update_layout(
+                title='Feature Importance',
+                xaxis_title='Importance',
+                yaxis_title='Feature',
+                bargap=0.1,
+                width=600,
+                height=800)
+
+    # Display the bar chart using Plotly chart in Streamlit
+            st.plotly_chart(fig)
+
+    # Explanation of feature importance
+            importance_explanation = f"The feature importance plot shows the relative importance of each feature " \
+                       f"for predicting churn. The importance is calculated based on the " \
+                       f"{importance_type} value of each feature in the model. " \
+                       f"A higher {importance_type} value indicates a stronger influence " \
+                       f"of the corresponding feature on the prediction of churn.\n\n" \
+                       f"For logistic regression, positive {importance_type} values indicate " \
+                       f"features that positively contribute to predicting churn, " \
+                       f"while negative {importance_type} values indicate features that " \
+                       f"negatively contribute to predicting churn.\n\n" \
+                       f"For gradient boosting, higher {importance_type} values " \
+                       f"indicate features that have a greater importance in predicting churn.\n\n" \
+                       f"Please note that the feature importance values may vary depending on the model " \
+                       f"and the data used for training."
+
+
+            st.write(importance_explanation)
+
+
+    except Exception as e:
+        st.error(f"An error occurred: {str(e)}")