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How to pass values from python to html checkboxs?

I am new to flask and html. How do I pass values from flask to html checkbox? Like I have milk, chocolate, water in my flask. How do I send it to html check boxes?

you have list of values

just use for loop in HTML section

and use <input type="checkbox" name="box1" value="box1" {{'checked="checked"' if box1 else ""}}/>

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