Create utils.py

utils.py

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+import matplotlib.pyplot as plt
+import numpy as np
+from io import BytesIO
+import base64
+
+cheating_scores = []
+
+def plot_cheating_graph():
+    fig, ax = plt.subplots()
+    ax.plot(cheating_scores, color='red', label='Cheating Score')
+    ax.set_xlabel("Time")
+    ax.set_ylabel("Cheating Probability")
+    ax.set_title("Live Cheating Detection Graph")
+    ax.legend()
+    buf = BytesIO()
+    plt.savefig(buf, format='png')
+    buf.seek(0)
+    encoded = base64.b64encode(buf.read()).decode('utf-8')
+    plt.close(fig)
+    return f"data:image/png;base64,{encoded}"
+
+def update_score(cheating):
+    score = 1 if cheating else 0
+    cheating_scores.append(score)
+    if len(cheating_scores) > 50:
+        cheating_scores.pop(0)