made some work for pastedb / pastecache..

btc_tracker/01042023/TheClient/database/db_utils.py

@@ -0,0 +1,27 @@
+import sqlite3
+
+class Database():
+    def __init__(self, db_file):
+        self.db_file = db_file
+        self._create_table()
+
+    def _create_table(self):
+        with sqlite3.connect(self.db_file) as conn:
+            cursor = conn.cursor()
+            cursor.execute('''CREATE TABLE IF NOT EXISTS timeseries
+                              (timestamp INTEGER PRIMARY KEY, value REAL)''')
+            conn.commit()
+
+    def insert_data(self, timestamp, value):
+        with sqlite3.connect(self.db_file) as conn:
+            cursor = conn.cursor()
+            cursor.execute('''INSERT INTO timeseries (timestamp, value)
+                              VALUES (?, ?)''', (timestamp, value))
+            conn.commit()
+
+    def fetch_data(self, limit):
+        with sqlite3.connect(self.db_file) as conn:
+            cursor = conn.cursor()
+            cursor.execute('''SELECT timestamp, value FROM timeseries
+                              ORDER BY timestamp DESC LIMIT ?''', (limit,))
+            return cursor.fetchall()