human
Solve the following python programming problem given the following code:
def get_html_context(self) : 
    base_url = self.request.build_absolute_uri () 
    def page_number_to_url(page_number) : 
        if (page_number == 1) : 
            return remove_query_param (base_url, self.page_query_param) 
else : 
            return replace_query_param (base_url, self.page_query_param, page_number) 
current = self.page.number 
    final = self.page.paginator.num_pages 
    page_numbers = _get_displayed_page_numbers (current, final) 
    page_links = _get_page_links (page_numbers, current, <MASK>) 
    return { 
        'previous_url' : self.get_previous_link (), 
        'next_url' : self.get_next_link (), 
        'page_links' : page_links, 
} 
    
    Given the code above, what is a proper replacement for <MASK>? Choose among: self, page_numbers, base_url, page_links, final, current
assistant
#Here is a proper replacement for <MASK>.
def page_number_to_url(