find_tag_content.py

def find_tag_content(html, tag_name):
    result = []
    html = " " + html + " "
    index_init = 0
    index_end = 0
    while index_init > -1:
        index_init = html.find('<'+tag_name, index_init+1)

        index_end = html.find('</'+tag_name, index_end+1)

        if index_init > -1 and index_end > -1:
            result.append(html[index_init+len(tag_name)+2:index_end])

    return result

html = "<p>blabla <strong>bloblo ble</strong> blub blu <strong> parara</strong> terere</p>"

print(find_tag_content(html, "strong"))