Flask Framework Cookbook - Second Edition

How to do it...

Using pdb is pretty simple in most cases. We just need to insert the following statement wherever we want to insert a breakpoint to inspect a certain block of code:

import pdb; pdb.set_trace() 

This will trigger the application to break execution at this point, and then, we can step through the stack frames one by one using the debugger commands.

So, let's insert this statement in one of our methods, say, the handler for products:

def products(page=1): 
    products = Product.query.paginate(page, 10) 
    import pdb; pdb.set_trace() 
    return render_template('products.html', products=products)