Regression search in python if condition

I am trying to search whole word pid in the link but somewhat this is also searching for id in this code

    for a in self.soup.find_all(href=True):

        if 'pid' in a['href']:
            href = a['href']
            if not href or len(href) <= 1:
                continue
            elif 'javascript:' in href.lower():
                continue
            else:
                href = href.strip()
            if href[0] == '/':
                href = (domain_link + href).strip()
            elif href[:4] == 'http':
                href = href.strip()
            elif href[0] != '/' and href[:4] != 'http':
                href = ( domain_link + '/' + href ).strip()
            if '#' in href:
                indx = href.index('#')
                href = href[:indx].strip()
            if href in links:
                continue

            links.append(self.re_encode(href))