Finds the URLs for all allele files

def find_loci(self):
        """
        Finds the URLs for all allele files
        """
        session = OAuth1Session(self.consumer_key,
                                self.consumer_secret,
                                access_token=self.session_token,
                                access_token_secret=self.session_secret)
        # Use the URL for all loci determined above
        r = session.get(self.loci)
        if r.status_code == 200 or r.status_code == 201:
            if re.search('json', r.headers['content-type'], flags=0):
                decoded = r.json()
            else:
                decoded = r.text
            # Extract all the URLs in the decoded dictionary under the key 'loci'
            for locus in decoded['loci']:
                # Add each URL to the list
                self.loci_url.append(locus)