【发布时间】：2020-07-14 20:00:55
【问题描述】：
当前代码：
import requests
import pandas as pd
url = 'https://docs.anaconda.com/anaconda/user-guide/getting-started/'
html = requests.get(url, verify=False).content
df_list = pd.read_html(html, flavor='bs4')
df = df_list[0]
我想在设置 'flavor' arg = 'bs4' 或 'html5lib' 时使用 pandas.read_html() 函数从页面中提取 html。我收到错误：ImportError: html5lib not found, please install it.
C:\Users\...\Miniconda3\lib\site-packages\urllib3\connectionpool.py:1004: InsecureRequestWarning: Unverified HTTPS request is being made to host 'docs.anaconda.com'. Adding certificate verification is strongly advised. See: https://urllib3.readthedocs.io/en/latest/advanced-usage.html#ssl-warnings
InsecureRequestWarning,
Traceback (most recent call last):
File "C:\Users\...\Documents\...\data_scrape.py", line 11, in <module>
df_list = pd.read_html(html, flavor='bs4')
File "C:\Users\...\Miniconda3\lib\site-packages\pandas\io\html.py", line 1100, in read_html
displayed_only=displayed_only,
File "C:\Users\...\Miniconda3\lib\site-packages\pandas\io\html.py", line 891, in _parse
parser = _parser_dispatch(flav)
File "C:\Users\...\Miniconda3\lib\site-packages\pandas\io\html.py", line 840, in _parser_dispatch
raise ImportError("html5lib not found, please install it")
ImportError: html5lib not found, please install it
但我当然在环境中安装了 bs4 和 html5lib。运行 conda list 命令后：
conda list
# packages in environment at C:\Users\...\Miniconda3\envs\web_scrape:
#
# Name Version Build Channel
beautifulsoup4 4.9.1 py38h32f6830_0 conda-forge
bs4 4.9.1 0 conda-forge
ca-certificates 2020.6.20 hecda079_0 conda-forge
certifi 2020.6.20 py38h32f6830_0 conda-forge
html5lib 1.1 pyh9f0ad1d_0 conda-forge
intel-openmp 2020.1 216
libblas 3.8.0 16_mkl conda-forge
libcblas 3.8.0 16_mkl conda-forge
libiconv 1.15 vc14h29686d3_5 [vc14] anaconda
liblapack 3.8.0 16_mkl conda-forge
libxml2 2.9.10 h464c3ec_1 anaconda
libxslt 1.1.34 he774522_0 anaconda
lxml 4.5.2 py38he3d0fc9_0 conda-forge
mkl 2020.1 216
numpy 1.18.5 py38h72c728b_0 conda-forge
openssl 1.1.1g he774522_0 conda-forge
pandas 1.0.5 py38he6e81aa_0 conda-forge
pip 20.1.1 py_1 conda-forge
python 3.8.3 cpython_h5fd99cc_0 conda-forge
python-dateutil 2.8.1 py_0 conda-forge
python_abi 3.8 1_cp38 conda-forge
pytz 2020.1 pyh9f0ad1d_0 conda-forge
setuptools 49.2.0 py38h32f6830_0 conda-forge
six 1.15.0 pyh9f0ad1d_0 conda-forge
soupsieve 2.0.1 py38h32f6830_0 conda-forge
sqlite 3.32.3 he774522_1 conda-forge
vc 14.1 h869be7e_1 conda-forge
vs2015_runtime 14.16.27012 h30e32a0_2 conda-forge
webencodings 0.5.1 py_1 conda-forge
wheel 0.34.2 py_1 conda-forge
wincertstore 0.2 py38_1003 conda-forge
我不知道为什么 pandas 函数无法识别这些包。有多个其他帖子处理相同的问题，但没有一个解决方案对我有用。
例如，像这样的一些帖子： Python: ImportError: lxml not found, please install it 和
以上答案建议使用 pip3 安装软件包。当我运行这些命令时，我会得到以下信息。
pip3 install html5lib
Requirement already satisfied: html5lib in c:\users\...\miniconda3\envs\web_scrape\lib\site-packages (1.1)
Requirement already satisfied: six>=1.9 in c:\users\...\miniconda3\envs\web_scrape\lib\site-packages (from html5lib) (1.15.0)
Requirement already satisfied: webencodings in c:\users\...\miniconda3\envs\web_scrape\lib\site-packages (from html5lib) (0.5.1)
感谢任何帮助或对类似问题的参考！
谢谢！
【问题讨论】：
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我不知道您是如何运行第一个函数的，但是原始（失败）函数看起来是在系统 miniconda 中运行的，而您的其他两个示例显然是在 conda env 中运行的。系统站点包没有这些包，但你的 conda 环境有。
标签： python pandas beautifulsoup html5lib