Why would MySQL execute return None?

Question

I am trying to query on a local MySQL database using Python\'s (3.4) MySQL module with the following code:

class databases():

  def externaldatabase(self):
         


        

Answer 1

Query executions have no return values.

The pattern you need to follow is:

cursor creation;
cursor, execute query;
cursor, *fetch rows*;

Or in python:

c = d.cursor()

c.execute(query)    # selected rows stored in cursor memory

rows = c.fetchall()    # get all selected rows, as Barmar mentioned
for r in rows:
    print(r)

Also some db modules allow you to iterate over the cursor using the for...in pattern, but triple-check that regarding mysql.