updated python_flask

Helzheng123 · Sep 26, 2023 · 1068514 · 1068514
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diff --git a/python_flask/app.py b/python_flask/app.py
@@ -0,0 +1,47 @@
+from flask import Flask, render_template, request
+import pandas as pd
+import matplotlib
+matplotlib.use('Agg') # required for local development and g-shell
+import matplotlib.pyplot as plt
+import io
+import base64
+
+import warnings
+warnings.simplefilter("ignore", UserWarning)
+
+app = Flask(__name__)
+
+# Load the dataset
+url = "https://raw.githubusercontent.com/Helzheng123/datasci_4_web_viz/main/dataset/PLACES__Local_Data_for_Better_Health__County_Data_2023_release.csv"
+df = pd.read_csv(url)
+df_diabetes = df[(df['MeasureId'] == 'DIABETES') & (df['Data_Value_Type'] == 'Age-adjusted prevalence')]
+
+@app.route('/', methods=['GET', 'POST'])
+def index():
+    counties = sorted(df_diabetes['LocationName'].unique())
+    selected_county = request.form.get('county') or counties[0]
+
+    img = create_plot(selected_county)
+
+    return render_template("index.html", counties=counties, selected_county=selected_county, img=img)
+
+def create_plot(county):
+    overall_avg = df_diabetes['Data_Value'].mean()
+    selected_county_avg = df_diabetes[df_diabetes['LocationName'] == county]['Data_Value'].mean()
+
+    fig, ax = plt.subplots(figsize=(10, 6))
+    ax.bar(['Selected County', 'Overall Average'], [selected_county_avg, overall_avg], color=['orchid', 'darksalmon'])
+    ax.axhline(selected_county_avg, color='gray', linestyle='dashed', alpha=0.7)
+    ax.set_ylabel('Data Value (Age Adjusted prevalence) - Percent')
+    ax.set_ylim(0, 30)
+    ax.set_title('Diagnosed Diabetes Age Adjusted Prevalence Comparison')
+
+    # Convert plot to PNG image
+    img = io.BytesIO()
+    plt.savefig(img, format='png')
+    img.seek(0)
+
+    return base64.b64encode(img.getvalue()).decode()
+
+if __name__ == '__main__':
+    app.run(debug=True)
diff --git a/python_flask/templates/index.html b/python_flask/templates/index.html
@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <title>Flask Diabetes App</title>
+</head>
+<body>
+
+<h2>Diagnosed Diabetes Prevalence in Connecticut by County</h2>
+
+<form method="post">
+    <select name="county" onchange="this.form.submit()">
+        {% for county in counties %}
+        <option value="{{ county }}" {% if county == selected_county %} selected {% endif %}>{{ county }}</option>
+        {% endfor %}
+    </select>
+</form>
+
+<img src="data:image/png;base64,{{ img }}" alt="Diabetes Prevalance Visualization" />
+
+</body>
+</html>