[Zope] Change db connect string in python or dtml

[Magnus Heino]

Hi.                                                                   
                                                                      
I have an instance of a 'Z MySQL Database Connection' called mysql.   
                                                                      
How can I change the 'Database Connection String' and then then try to
connect, either in dtml or python?                                    
                                                                      
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/Magnus Heino