human
Complete this python program:
def iter_params_for_processing(invocation_order, declaration_order):
assistant
#Here is the Python program you requested.

    """Given a sequence of parameters in the order as should be considered
    for processing and an iterable of parameters that exist, this returns
    a list in the correct order as they should be processed.
    """
    def sort_key(item):
        try:
            idx = invocation_order.index(item)
        except ValueError:
            idx = float('inf')
        return ((not item.is_eager), idx)
    return sorted(declaration_order, key=sort_key)