Beautiful Soup findAll 没有找到它们

Posted 2023-02-23

【中文标题】Beautiful Soup findAll 没有找到它们

【英文标题】：Beautiful Soup findAll doesn't find them all

【发布时间】：2013-04-25 17:30:04

【问题描述】：

我正在尝试解析网站并使用 find_all() 方法获取一些信息，但它没有找到所有信息。

这是代码：

#!/usr/bin/python3

from bs4 import BeautifulSoup
from urllib.request import urlopen

page = urlopen ("http://mangafox.me/directory/")
# print (page.read ())
soup = BeautifulSoup (page.read ())

manga_img = soup.findAll ('a', 'class' : 'manga_img', limit=None)

for manga in manga_img:
    print (manga['href'])

它只打印其中的一半......

【参考方案1】：

不同的 html 解析器以不同的方式处理损坏的 HTML。该页面提供了损坏的 HTML，lxml 解析器不能很好地处理它：

>>> import requests
>>> from bs4 import BeautifulSoup
>>> r = requests.get('http://mangafox.me/directory/')
>>> soup = BeautifulSoup(r.content, 'lxml')
>>> len(soup.find_all('a', class_='manga_img'))
18

标准库html.parser 在这个特定页面上的麻烦更少：

>>> soup = BeautifulSoup(r.content, 'html.parser')
>>> len(soup.find_all('a', class_='manga_img'))
44

使用urllib 将其转换为您的特定代码示例，您可以这样指定解析器：

soup = BeautifulSoup(page, 'html.parser')  # BeatifulSoup can do the reading

【参考方案2】：

获取所有href 元素的快速方法是使用CSS 选择器，它将选择所有a 标记，其中href 元素在开始链接中包含/manga。

输出将包含所有以/manga/"title" 开头的链接（使用检查器在开发工具中检查）：

import requests
from bs4 import BeautifulSoup
import lxml

html = requests.get('http://fanfox.net/directory/').text
soup = BeautifulSoup(html, 'lxml')

for a_tag in soup.select('a[href*="/manga"]'):
    link = a_tag['href']
    link = link[1:]
    print(f'http://fanfox.net/link')

---

替代方法：

将 requests.get 更改为不同的 URL (directory/2.html)

这是工作代码（也适用于 2-3-4-5-6.. 页面）和replit.com 玩：

import requests
from bs4 import BeautifulSoup
import lxml

html = requests.get('http://fanfox.net/directory/').text
soup = BeautifulSoup(html, 'lxml')

for manga in soup.select('.line'):
    title = manga.select('.manga-list-1-item-title a')
    for t in title:
        print(t.text)
    for i in manga.findAll('img', class_='manga-list-1-cover'):
        img = i['src']
        print(img)
    for l in manga.findAll('p', class_='manga-list-1-item-title'):
        link = l.a['href']
        link = link[1:]
        print(f'http://fanfox.net/link')

输出（可能更漂亮），按顺序排列：

A Story About Treating a Female Knig...
Tales of Demons and Gods
Martial Peak
Onepunch-Man
One Piece
Star Martial God Technique
Solo Leveling
The Last Human
Kimetsu no Yaiba
Versatile Mage
Boku no Hero Academia
Apotheosis
Black Clover
Tensei Shitara Slime Datta Ken
Kingdom
Tate no Yuusha no Nariagari
Tomo-chan wa Onna no ko!
Goblin Slayer
Yakusoku no Neverland
God of Martial Arts
Kaifuku Jutsushi no Yarinaoshi
Re:Monster
Mushoku Tensei - Isekai Ittara Honki...
Nanatsu no Taizai
Battle Through the Heavens
Shingeki no Kyojin
Iron Ladies
Monster Musume no Iru Nichijou
World’s End Harem
Bleach
Parallel Paradise
Shokugeki no Soma
Spirit Sword Sovereign
Horimiya
Dungeon ni Deai o Motomeru no wa Mac...
Dr. Stone
Berserk
The New Gate
Akatsuki no Yona
Naruto
Overlord
Death March kara Hajimaru Isekai Kyo...
Tsuki ga Michibiku Isekai Douchuu
Eternal Reverence
Minamoto-kun Monogatari
Beastars
Jujutsu Kaisen
Hajime no Ippo
Kaguya-sama wa Kokurasetai - Tensai-...
Domestic na Kanojo
The Legendary Moonlight Sculptor
The Gamer
Kumo desu ga, nani ka?
Bokutachi wa Benkyou ga Dekinai
Enen no Shouboutai
Tsuyokute New Saga
Fairy Tail
Komi-san wa Komyushou Desu.
Kenja no Mago
Soul Land
Boruto: Naruto Next Generations
Hunter X Hunter
History’s Strongest Disciple Kenichi
Phoenix against the World
LV999 no Murabito
Gate - Jietai Kare no Chi nite, Kaku...
Kengan Asura
Konjiki no Moji Tsukai - Yuusha Yoni...
Please don’t bully me, Nagatoro
Isekai Maou to Shoukan Shoujo Dorei ...
http://fmcdn.mfcdn.net/store/manga/27418/cover.jpg?token=64e5c0c930644528cba6eb2f2f5f5a2f3762188d&ttl=1616839200&v=1615891672
http://fmcdn.mfcdn.net/store/manga/16627/cover.jpg?token=33f5ea4c1ba1a013c5bdcfdac87209fe472cf6d5&ttl=1616839200&v=1616396463
http://fmcdn.mfcdn.net/store/manga/27509/cover.jpg?token=ce2b16e8e867a8ce13ad0bee9940b68eef324cac&ttl=1616839200&v=1616737688
http://fmcdn.mfcdn.net/store/manga/11362/cover.jpg?token=1a5876d8a767fd27b26f0287bbb36eb82f9cf811&ttl=1616839200&v=1615796703
http://fmcdn.mfcdn.net/store/manga/106/cover.jpg?token=5313fc0dae53f33fcd1284cd4858603fc47ffa04&ttl=1616839200&v=1616748903
http://fmcdn.mfcdn.net/store/manga/22443/cover.jpg?token=89760754754a63efc875aa7e2de0536a5238bed3&ttl=1616839200&v=1616396922
http://fmcdn.mfcdn.net/store/manga/29037/cover.jpg?token=e8b496db4ad520f002040761c5887bc1e17af63a&ttl=1616839200&v=1616653683
http://fmcdn.mfcdn.net/store/manga/28343/cover.jpg?token=71c1b201e4d714f893efb7ac984c9787dd8df915&ttl=1616839200&v=1616748232
http://fmcdn.mfcdn.net/store/manga/19287/cover.jpg?token=803eb8beab4dc6aa8d73f5137a6e3331c0034d24&ttl=1616839200&v=1609900224
http://fmcdn.mfcdn.net/store/manga/27761/cover.jpg?token=6c11f2bddb31b460fccc9a158cc13b9593fb1ad2&ttl=1616839200&v=1616740672
http://fmcdn.mfcdn.net/store/manga/14356/cover.jpg?token=93638c7ec630de193299caa8d513e045818b35ce&ttl=1616839200&v=1616170144
http://fmcdn.mfcdn.net/store/manga/27118/cover.jpg?token=9c876792ad8e6e5f9777386184ea8e6f409aa9fd&ttl=1616839200&v=1616654344
http://fmcdn.mfcdn.net/store/manga/15291/cover.jpg?token=e0a3195fcc88e397703e8bdf6580a62a0d856816&ttl=1616839200&v=1616345844
http://fmcdn.mfcdn.net/store/manga/15975/cover.jpg?token=e07844bb607a3d53ababab51683ee6fa06906d7c&ttl=1616839200&v=1616733843
http://fmcdn.mfcdn.net/store/manga/8198/cover.jpg?token=bc135016049bb63e5b65ec87207e0c91bb0c62c8&ttl=1616839200&v=1616335864
http://fmcdn.mfcdn.net/store/manga/14036/cover.jpg?token=c13dab07379e88fb871d3d833999ead13bfaf0fc&ttl=1616839200&v=1615393923
http://fmcdn.mfcdn.net/store/manga/16159/cover.jpg?token=cdf538f92f729999bcb9fcae7fb31b7a8c306c92&ttl=1616839200&v=1569492366
http://fmcdn.mfcdn.net/store/manga/20569/cover.jpg?token=f9c08cde2f0a6bd646dc87dc4a8dee6fa44eca3c&ttl=1616839200&v=1616680427
http://fmcdn.mfcdn.net/store/manga/21271/cover.jpg?token=062fd439c18afaf178d3408c64b2b305f679e91a&ttl=1616839200&v=1611285077
http://fmcdn.mfcdn.net/store/manga/26916/cover.jpg?token=cda99bf9831ada1322045bf82893a9ed1ad868d5&ttl=1616839200&v=1615188784
http://fmcdn.mfcdn.net/store/manga/26841/cover.jpg?token=055e9ff117c28b3a7c3089c4d691228adeba1f55&ttl=1616839200&v=1616201299
http://fmcdn.mfcdn.net/store/manga/13895/cover.jpg?token=e7661738326d62d38b5f93771105898cb95adaba&ttl=1616839200&v=1612570263
http://fmcdn.mfcdn.net/store/manga/14217/cover.jpg?token=3263f009d5b42e441a09e14c44e3fd7d12a83089&ttl=1616839200&v=1615259584
http://fmcdn.mfcdn.net/store/manga/11374/cover.jpg?token=ab9d85a9efdd5b41391db5249bcf0011ce07070f&ttl=1616839200&v=1600762925
http://fmcdn.mfcdn.net/store/manga/14225/cover.jpg?token=e8912699841e28f9ca8b40eb8fe1d37d2a6ce3e3&ttl=1616839200&v=1616097340
http://fmcdn.mfcdn.net/store/manga/9011/cover.jpg?token=eaca757d4352b66d4ef69812ec5c265b5a2f7a28&ttl=1616839200&v=1614982324
http://fmcdn.mfcdn.net/store/manga/29235/cover.jpg?token=23b3338eaa8984bad9c17a2d604c60c909282715&ttl=1616839200&v=1614666974
http://fmcdn.mfcdn.net/store/manga/10348/cover.jpg?token=c4209cc06013a704c9f7a0e942b8ae55a7546941&ttl=1616839200&v=1616082423
http://fmcdn.mfcdn.net/store/manga/20107/cover.jpg?token=699e867d86e4957b8ef4d3eee5200f80cdbbea88&ttl=1616839200&v=1610529669
http://fmcdn.mfcdn.net/store/manga/9/cover.jpg?token=a4894a5ce212a490dda9c6cf73b717bbfbf015c3&ttl=1616839200&v=1616593028
http://fmcdn.mfcdn.net/store/manga/24693/cover.jpg?token=d968c24525bc6fe467f40c9ad2ff087ebfb60e4a&ttl=1616839200&v=1615325943
http://fmcdn.mfcdn.net/store/manga/11529/cover.jpg?token=1a3ab38ba3f212d5c95138bb690b155f38390aab&ttl=1616839200&v=1615891829
http://fmcdn.mfcdn.net/store/manga/28001/cover.jpg?token=1769a66a83df9adfed58a36dc9275f202d1f8f37&ttl=1616839200&v=1615891671
http://fmcdn.mfcdn.net/store/manga/11147/cover.jpg?token=e6d602fcd4b438ec299c955738487127cef7a3bf&ttl=1616839200&v=1616264399
http://fmcdn.mfcdn.net/store/manga/12978/cover.jpg?token=7e9094f238fcbd19717ffeeb4dcfe686a99dba4b&ttl=1616839200&v=1568611983
http://fmcdn.mfcdn.net/store/manga/24445/cover.jpg?token=0f77d7a743c0f613ff773f3e430f688e3aa77239&ttl=1616839200&v=1616345762
http://fmcdn.mfcdn.net/store/manga/176/cover.jpg?token=e8e87528092cd5b902767d7564e035486b8535f2&ttl=1616839200&v=1611297351
http://fmcdn.mfcdn.net/store/manga/14588/cover.jpg?token=469da1dfa4953459e08efdeb24561f78f7a68b47&ttl=1616839200&v=1615891989
http://fmcdn.mfcdn.net/store/manga/9126/cover.jpg?token=53689bb06b90c163b58b0410e80252941b27aff6&ttl=1616839200&v=1616083893
http://fmcdn.mfcdn.net/store/manga/8/cover.jpg?token=8e5cbd08bd42f0684f36f107fc991c75b56bbed2&ttl=1616839200&v=1615891989
http://fmcdn.mfcdn.net/store/manga/14765/cover.jpg?token=8a8e0582258d852b4c9d017567dd6820958f5a67&ttl=1616839200&v=1615042503
http://fmcdn.mfcdn.net/store/manga/16457/cover.jpg?token=7e59859f7af131902006c3eb8ed55745ef14573f&ttl=1616839200&v=1613139843
http://fmcdn.mfcdn.net/store/manga/16675/cover.jpg?token=cbb268f1326b704b1bb11accadc35ae3b7222e39&ttl=1616839200&v=1615891829
http://fmcdn.mfcdn.net/store/manga/26261/cover.jpg?token=d83f514efe719b2dd301c2ecc8d672e9d935084c&ttl=1616839200&v=1613384403
http://fmcdn.mfcdn.net/store/manga/9518/cover.jpg?token=76170cb8b2defc468a817a69bf6e799900c4fd9f&ttl=1616839200&v=1596437944
http://fmcdn.mfcdn.net/store/manga/24547/cover.jpg?token=b99d7b791e14ec290054d57ead4dcf9fb61b4d7a&ttl=1616839200&v=1615891989
http://fmcdn.mfcdn.net/store/manga/27861/cover.jpg?token=d14b0f3f2362869830c2971007e86ca43637bb85&ttl=1616839200&v=1616345044
http://fmcdn.mfcdn.net/store/manga/231/cover.jpg?token=53c2dc9eb6bf5c6f635de12496088a27b28e04f7&ttl=1616839200&v=1616418784
http://fmcdn.mfcdn.net/store/manga/17825/cover.jpg?token=f1b7954fba32d3146282b2b5bba4e1419578d65b&ttl=1616839200&v=1616677923
http://fmcdn.mfcdn.net/store/manga/14099/cover.jpg?token=7b7a61b4e544a65a75394e4cabf04831cf0c5d7a&ttl=1616839200&v=1611909666
http://fmcdn.mfcdn.net/store/manga/15177/cover.jpg?token=4442c2f4cf7e5c69d3449e7b358960930ff19e11&ttl=1616839200&v=1605145143
http://fmcdn.mfcdn.net/store/manga/13088/cover.jpg?token=d8ab36b3d0f4d9c6263a4f482f98c4d99809eb36&ttl=1616839200&v=1616641226
http://fmcdn.mfcdn.net/store/manga/18225/cover.jpg?token=ea670a4bc8d1aa0312f5427b24bf5702c12ef3a3&ttl=1616839200&v=1615470603
http://fmcdn.mfcdn.net/store/manga/23945/cover.jpg?token=9e078e0cb6da91194a6f86c814ae03922e8460d0&ttl=1616839200&v=1615891671
http://fmcdn.mfcdn.net/store/manga/17045/cover.jpg?token=3026e40a21e490f37c656a778e9227c6c891cade&ttl=1616839200&v=1615891829
http://fmcdn.mfcdn.net/store/manga/13930/cover.jpg?token=f773694a746e2015b4ca5c46afcc801d9795393c&ttl=1616839200&v=1616100123
http://fmcdn.mfcdn.net/store/manga/246/cover.jpg?token=3926211df393a0d50e58c0285c05f067c1ad64e5&ttl=1616839200&v=1615891989
http://fmcdn.mfcdn.net/store/manga/17189/cover.jpg?token=f9ffcf2a07bb8d1f7a49eac36c1f6c4fcd7e5622&ttl=1616839200&v=1616514627
http://fmcdn.mfcdn.net/store/manga/20299/cover.jpg?token=121f6571e072381a545e9e3790b4bf1723865859&ttl=1616839200&v=1615891671
http://fmcdn.mfcdn.net/store/manga/13841/cover.jpg?token=86245cf3afab622c35a41f4e2bf388ac48713906&ttl=1616839200&v=1615891672
http://fmcdn.mfcdn.net/store/manga/19939/cover.jpg?token=563a2963a0a153ac1c53779712f48af5630e0377&ttl=1616839200&v=1616714152
http://fmcdn.mfcdn.net/store/manga/44/cover.jpg?token=febabec452a05c1415f02bf8387a0a8f16c20137&ttl=1616839200&v=1548837372
http://fmcdn.mfcdn.net/store/manga/107/cover.jpg?token=3dcce47a3a6760b9b81b7b576711980d36cf7be1&ttl=1616839200&v=1543561843
http://fmcdn.mfcdn.net/store/manga/24241/cover.jpg?token=b4a1834d714f0476c2d99c5ffb905351c7a4d72f&ttl=1616839200&v=1616176266
http://fmcdn.mfcdn.net/store/manga/25773/cover.jpg?token=7bf8a8e9346a02250bb24cd8e6e4da0933e6a05f&ttl=1616839200&v=1616655977
http://fmcdn.mfcdn.net/store/manga/10956/cover.jpg?token=db3b74dc959adedbd847142cd3a079caca6b25d1&ttl=1616839200&v=1612043463
http://fmcdn.mfcdn.net/store/manga/15593/cover.jpg?token=caceb80b7266f438bdedae8cf69653ab7911fe68&ttl=1616839200&v=1606188363
http://fmcdn.mfcdn.net/store/manga/14916/cover.jpg?token=0dab5e6797f4cc915a035632ed0d02a2492afbcc&ttl=1616839200&v=1609752363
http://fmcdn.mfcdn.net/store/manga/26771/cover.jpg?token=77a6aa9bbb7ebcd3df15cd4cc65b4e3915e96ed4&ttl=1616839200&v=1615891829
http://fmcdn.mfcdn.net/store/manga/16569/cover.jpg?token=e5815ac1520ad179ad2d6f798e4b6ead6790cd33&ttl=1616839200&v=1614957071
http://fanfox.net/manga/a_story_about_treating_a_female_knight_who_has_never_been_treated_as_a_woman_as_a_woman/
http://fanfox.net/manga/tales_of_demons_and_gods/
http://fanfox.net/manga/martial_peak/
http://fanfox.net/manga/onepunch_man/
http://fanfox.net/manga/one_piece/
http://fanfox.net/manga/star_martial_god_technique/
http://fanfox.net/manga/solo_leveling/
http://fanfox.net/manga/the_last_human/
http://fanfox.net/manga/kimetsu_no_yaiba/
http://fanfox.net/manga/versatile_mage/
http://fanfox.net/manga/boku_no_hero_academia/
http://fanfox.net/manga/apotheosis/
http://fanfox.net/manga/black_clover/
http://fanfox.net/manga/tensei_shitara_slime_datta_ken/
http://fanfox.net/manga/kingdom/
http://fanfox.net/manga/tate_no_yuusha_no_nariagari/
http://fanfox.net/manga/tomo_chan_wa_onna_no_ko/
http://fanfox.net/manga/goblin_slayer/
http://fanfox.net/manga/yakusoku_no_neverland/
http://fanfox.net/manga/god_of_martial_arts/
http://fanfox.net/manga/kaifuku_jutsushi_no_yarinaoshi/
http://fanfox.net/manga/re_monster/
http://fanfox.net/manga/mushoku_tensei_isekai_ittara_honki_dasu/
http://fanfox.net/manga/nanatsu_no_taizai/
http://fanfox.net/manga/battle_through_the_heavens/
http://fanfox.net/manga/shingeki_no_kyojin/
http://fanfox.net/manga/iron_ladies/
http://fanfox.net/manga/monster_musume_no_iru_nichijou/
http://fanfox.net/manga/world_s_end_harem/
http://fanfox.net/manga/bleach/
http://fanfox.net/manga/parallel_paradise/
http://fanfox.net/manga/shokugeki_no_soma/
http://fanfox.net/manga/spirit_sword_sovereign/
http://fanfox.net/manga/horimiya/
http://fanfox.net/manga/dungeon_ni_deai_o_motomeru_no_wa_machigatte_iru_darou_ka/
http://fanfox.net/manga/dr_stone/
http://fanfox.net/manga/berserk/
http://fanfox.net/manga/the_new_gate/
http://fanfox.net/manga/akatsuki_no_yona/
http://fanfox.net/manga/naruto/
http://fanfox.net/manga/overlord/
http://fanfox.net/manga/death_march_kara_hajimaru_isekai_kyousoukyoku/
http://fanfox.net/manga/tsuki_ga_michibiku_isekai_douchuu/
http://fanfox.net/manga/eternal_reverence/
http://fanfox.net/manga/minamoto_kun_monogatari/
http://fanfox.net/manga/beastars/
http://fanfox.net/manga/jujutsu_kaisen/
http://fanfox.net/manga/hajime_no_ippo/
http://fanfox.net/manga/kaguya_sama_wa_kokurasetai_tensai_tachi_no_renai_zunousen/
http://fanfox.net/manga/domestic_na_kanojo/
http://fanfox.net/manga/the_legendary_moonlight_sculptor/
http://fanfox.net/manga/the_gamer/
http://fanfox.net/manga/kumo_desu_ga_nani_ka/
http://fanfox.net/manga/bokutachi_wa_benkyou_ga_dekinai/
http://fanfox.net/manga/enen_no_shouboutai/
http://fanfox.net/manga/tsuyokute_new_saga/
http://fanfox.net/manga/fairy_tail/
http://fanfox.net/manga/komi_san_wa_komyushou_desu/
http://fanfox.net/manga/kenja_no_mago/
http://fanfox.net/manga/soul_land/
http://fanfox.net/manga/boruto_naruto_next_generations/
http://fanfox.net/manga/hunter_x_hunter/
http://fanfox.net/manga/history_s_strongest_disciple_kenichi/
http://fanfox.net/manga/phoenix_against_the_world/
http://fanfox.net/manga/lv999_no_murabito/
http://fanfox.net/manga/gate_jietai_kare_no_chi_nite_kaku_tatakeri/
http://fanfox.net/manga/kengan_asura/
http://fanfox.net/manga/konjiki_no_moji_tsukai_yuusha_yonin_ni_makikomareta_unique_cheat/
http://fanfox.net/manga/please_don_t_bully_me_nagatoro/
http://fanfox.net/manga/isekai_maou_to_shoukan_shoujo_dorei_majutsu/

我发现使用.find_all()/.findAll() 方法的最佳方法（对我来说）就是使用for loop，.select() 方法也是如此。

在某些情况下.select() 会提供更好的结果。 查看SelectorGadget 快速找到css 选择器。