I'm creating new definitions on my custom module and I have some doubts about the cursors I need to use.

Since I have developed my script on PyCharm I've created my set of cursor

try:
 con = psycopg2.connect(host='SERVERIP', database='DBNAME', user='odoo', password='XXXXX')
 cur = con.cursor() 

 where I use just

cur.fetchone(), cur.execute and con.commit()

As far I can see the file sql_db.py define the cursors that Odoo is using, starting with cr or cnx.

Since I would like to use my module with any db without insert new credentials I need to understand how Odoo is working.

Is technically correct to delete my connection and cursor declaration and use just the cr. already present on Odoo like

cr.fetchone(), cr.execute and cnx.commit()

or do I need to create a new layer?