Implementazione lettura file JSON

app.py

@@ -1,6 +1,19 @@
 from flask import Flask, jsonify, request, render_template
 import json
+import os
 
+compiti = []
+id_counter = 0
+
+def update_file():
+    with open('compiti.json', 'w') as f:
+        json.dump(compiti, f)
+
+if os.path.isfile('compiti.json'):
+    with open('compiti.json', 'r') as f:
+        compiti = json.load(f)
+        id_counter = 104
+else:
     compiti = [
     {"id": 1, "descrizione": "Compito matematica"},
     {"id": 2, "descrizione": "Consegna TPSIT progetto API REST"},
@@ -8,10 +21,9 @@ compiti = [
     {"id": 4, "descrizione": "Compito di italiano"}
     ]
     id_counter = 5
+    update_file()
+
 
-def update_file():
-    with open('compiti.json', 'w') as f:
-        json.dump(compiti, f)
 
 app = Flask(__name__)