Question

I have a php form which saves these values to the database:

• id
• rand (a randomly generated string)
• x_val
• y_val

I am calling these values back from database in a python program using mysqldb:

import MySQLdb

db = MySQLdb.connect("localhost","root","","test" )

cursor = db.cursor()

sql = "SELECT id,rand,x_val,y_val  FROM  table"
 try:
cursor.execute(sql)
results = cursor.fetchall()
results =  {}
for row in results:
  results[row[1]] = [row[0], row[2], row[3]]
  rand = row[1]
  x_val = row[2]
  y_val = row[3]

except:
 print "Error: unable to fecth data"

db.close()

UPDATE: It gives the Error -> Error: unable to fecth data

In this piece (as you can see) i want rand (i.e. row[1]) to serve as the identifier for the row. However, I am not able to find a way about how to use this as an identifier since rand = row[1] is called after the sql variable. In this example, I have used a static ’63kfjf’ rand value, which is just to show you the working. Is there a way?

Answer 1

After selecting your datas from DB, you can create a dictionnary with “rand” value as key:

Something like this:

dicResults =  {}
for row in results:
    dicResults[row[1]] = [row[0], row[2], row[3]]