V2EX = way to explore
V2EX 是一个关于分享和探索的地方
Sign Up Now
For Existing Member Sign In
推荐学习书目
› Learn Python the Hard Way
Python Sites
› PyPI - Python Package Index
› http://diveintopython.org/toc/index.html
› Pocoo
值得关注的项目
› PyPy
› Celery
› Jinja2
› Read the Docs
› gevent
› pyenv
› virtualenv
› Stackless Python
› Beautiful Soup
› 结巴中文分词
› Green Unicorn
› Sentry
› Shovel
› Pyflakes
› pytest
Python 编程
› pep8 Checker
Styles
› PEP 8
› Google Python Style Guide
› Code Style from The Hitchhiker's Guide
This topic created in 3478 days ago, the information mentioned may be changed or developed.
就是我之前用 find_all 定位了一个标签，然后我想再次用 find_all 查询第一次 find_all 的结果，可是却失败了
 |
1
uyhsefwa OP 或者可不可以把 find_all 的结果全部转换成 string ，
|
 |
2
b1eberg0n Oct 25, 2016
a = soup.findall('a')
b = a[0].findall('b') |
 |
3
Arthur2e5 Oct 25, 2016
改写一下 @b1eberg0n ，来个范围攻击的……
a_b = [a.findall('b') for a in soup.findall('a')] a_b_flat = [result for a in soup.findall('a') for result in a.findall('b')] |
|
4
uyhsefwa OP |
 |
6
orange88 Oct 25, 2016 via Android
li 是 none ，上一个没找到？
|
|
8
orange88 Oct 25, 2016 via Android
li[0].findall
|
 |
10
syahd Oct 25, 2016 via Android
find_all 返回的结果是个 list ，要其中的结果得把它迭代一遍才行，最好再加个异常处理，防止出现你这样的情况
|
 |
11
practicer Oct 25, 2016
get_all_secondary_elements(bs)
try: top_elements = bs.find_all(...) for top_element in top_elements: secondary_elements = top_element.find_all(...) if secondary_elements is not None: yield secondary_elements except (AttributeError, TypeError): yield secondary_elements = list(get_all_secondary_elements) |
 |
12
wyntergreg Oct 25, 2016
转成 tag 再 findall
|
|
13
b1eberg0n Oct 25, 2016
|
Select Language