pySQLite Insert speed

[mmm]

Oops  I did make a mistake. The code I wanted to test should have been

import copy
print 'Test 1'
pf= '?,?,?,?'
sqlx1= 'INSERT INTO DTABLE2 VALUES ( %s ) ' % pf
print sqlx1

print
print 'Test 2'
sqlx2= copy.copy(sqlx1)
sqlx3= sqlx1
pf= '?,?,?, ****'
print 'sqlx1= ', sqlx1
print 'sqlx2= ', sqlx2
print 'sqlx3= ', sqlx2

and the results would
 == output
 Test group 1
 INSERT INTO DTABLE2 VALUES ( ?,?,?,? )

 Test group 2
 sqlx1=  INSERT INTO DTABLE2 VALUES ( ?,?,?,? )
 sqlx2=  INSERT INTO DTABLE2 VALUES ( ?,?,?,? )
 sqlx3=  INSERT INTO DTABLE2 VALUES ( ?,?,?,? )

Such that sqlx1 does to change with the re-assignment of 'pf'
And of course immutables such as strings are immutable.  Got it now.