some kraken_fetch.py devoplemnt, its now runs in background thread!

btc_tracker/kraken_fetch.py

@@ -2,7 +2,8 @@
 
 import krakenex
 import json, sqlite3
-import requests, os
+import requests, os, time
+import threading
 
 database = "btc_ohlc.db"
 
@@ -155,8 +156,8 @@ def fetch_gemini():
     print(f"Error fetching data from Gemini API: {response.status_code}")
     return "Gemini: ERROR"
 
-def write_dict_to_database(in_dict):
+def write_dict_to_database(in_dict, connection):
-
+  cursor = connection.cursor()
   # Use placeholders for the values in the INSERT statement
   insert_query = "INSERT INTO ohlc (exchange, timestamp, open, high, low, close, volume_quote, volume_base, trades) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)"
 
@@ -169,21 +170,40 @@ def write_dict_to_database(in_dict):
             in_dict['volume_quote'], 
             in_dict['volume_base'], 
             in_dict['trades'])
-  cursor.execute(insert_query, values)
+  ## apply lock while writing to database
-  db.commit()
+  with database_lock:
+    cursor.execute(insert_query, values)
+    connection.commit()
 
 def get_the_data():
+   #cursor = db.cursor()
+   while True: 
+    db = sqlite3.connect(database)
+    write_dict_to_database(json.loads(fetch_kraken()), db)
+    write_dict_to_database(json.loads(fetch_bitfinex()), db)
+    write_dict_to_database(json.loads(fetch_bitstamp()), db)
+    write_dict_to_database(json.loads(fetch_gemini()), db)
+    db.close()
+    time.sleep(290)
     
-  write_dict_to_database(json.loads(fetch_kraken()))
-  write_dict_to_database(json.loads(fetch_bitfinex()))
-  write_dict_to_database(json.loads(fetch_bitstamp()))
-  write_dict_to_database(json.loads(fetch_gemini()))
-  
-  db.close()
 
 Checkthedatabase()
-db = sqlite3.connect(database)
-cursor = db.cursor()
-get_the_data()
 
-exit(0)
+database_lock = threading.Lock()
+# make this run in thread and allow contium to http api stuff
+fetch_thread = threading.Thread(target=get_the_data)
+fetch_thread.daemon = True
+fetch_thread.start()
+
+db = sqlite3.connect(database)
+count = 1
+while True:
+  if count % 10 == 0:
+    print("------- status ", count, "-------")
+    top2_rows = db.execute("SELECT * FROM ohlc LIMIT 2").fetchall()
+    print(json.dumps(top2_rows, indent=4))
+  else:
+    output = str(count) + ".. "
+    print(output, end = '\r')
+  count = count + 1
+  time.sleep(30)