trying to set buttons for a vj set

Hello, I am brand new in touch designer and I am using it for a project. I am following some guides and tutorials but I got a syntax error in the script.

‘‘SyntaxError: invalid syntax’’ on this —> s1 = op.(‘…/select1’)

Do you know which is the correct way or what is the problem?

Thank you!

The dot after op
Shouldn’t be there
Best
Stefan