bs4擷取任意兩個標籤之間的內容

#!/usr/bin/env python# -*- coding: utf-8 -*-import requestsfrom bs4 import BeautifulSoupimport bs4import lxmldef have_next(ele):    try:        ele.next()    except:        return False    return Truedef is_child(child, father):    if child in father:        return True    seek_list = father.contents    for i in seek_list:        if isinstance(i, bs4.element.NavigableString):            pass        elif child in i:            return True        else:            flag = is_child(child, i)            if flag == True:                return True    return Falsedef get_content_between_tables(pre, nxt):    #如果第二個table在第一個裡面    txt = ""    if is_child(nxt, pre):        cur = pre.next_element        while cur != nxt and cur is not None:            if isinstance(cur, bs4.element.NavigableString):                txt += cur            cur = cur.next_element    #類似並列關係    else:        #先找到pre結束的下一個元素        cur = pre.next_element        while is_child(cur, pre):            cur = cur.next_element        #擷取內容        while cur != nxt and cur is not None:            if isinstance(cur, bs4.element.NavigableString):                txt += cur            cur = cur.next_element    return txthtml = BeautifulSoup("""<div class="c">abc<a><b>123</b></a><c>234</c></div>""", 'lxml')div = html.find('div')txt = get_content_between_tables(div, html.find('c'))print txt