ModuleNotFoundError:没有名为“Extract”的模块（Python 3.7 Jupyter笔记本）

Question

我与pip一起安装了“extruct包”：

 pip install extruct

Collecting extruct
  Downloading https://files.pythonhosted.org/packages/d4/ab/9b705a8b2cf0bca59ec1b0729c8b8f80ecc8c79aced20463c1e19fa2bc99/extruct-0.10.0-py2.py3-none-any.whl
Requirement already satisfied: six in /usr/lib/python2.7/dist-packages (from extruct)
Collecting jstyleson (from extruct)
  Downloading https://files.pythonhosted.org/packages/5f/c1/3791e39d65c39b4e081010f2cf6f9443b7b6b9f6de63a5e458172c5c9376/jstyleson-0.0.2.tar.gz
Collecting rdflib<5.0.0 (from extruct)
  Downloading https://files.pythonhosted.org/packages/c5/77/1fa0f4cffd5faad496b1344ab665902bb2609f56e0fb19bcf80cff485da0/rdflib-4.2.2.tar.gz (905kB)
    100% |████████████████████████████████| 911kB 438kB/s 
Collecting lxml (from extruct)
  Downloading https://files.pythonhosted.org/packages/d1/2d/642ef7013aa56af52e14b5b7d53c5d591e6d038c9688e06d0f2a20ed26b2/lxml-4.5.2-cp27-cp27mu-manylinux1_x86_64.whl (5.5MB)
    100% |████████████████████████████████| 5.5MB 90kB/s 
Collecting html-text>=0.5.1 (from extruct)
  Downloading https://files.pythonhosted.org/packages/e7/03/648294dbaa62e55d8622d7b0435b970ca45738498536b92e2f417e3fd531/html_text-0.5.2-py2.py3-none-any.whl
Collecting w3lib (from extruct)
  Downloading https://files.pythonhosted.org/packages/a3/59/b6b14521090e7f42669cafdb84b0ab89301a42f1f1a82fcf5856661ea3a7/w3lib-1.22.0-py2.py3-none-any.whl
Collecting mf2py (from extruct)
  Downloading https://files.pythonhosted.org/packages/fe/09/116b5b42f5c8cbb1cc43408be9df12fc2bf9fc408dfc9b20311ef4ffbfec/mf2py-1.1.2.tar.gz
Collecting rdflib-jsonld (from extruct)
  Downloading https://files.pythonhosted.org/packages/f5/17/45e137be0d93b70827fe5529c0400731344a978bc792193d7d9152e6dbe4/rdflib-jsonld-0.5.0.tar.gz (55kB)
    100% |████████████████████████████████| 61kB 1.9MB/s 
Collecting isodate (from rdflib<5.0.0->extruct)
  Downloading https://files.pythonhosted.org/packages/9b/9f/b36f7774ff5ea8e428fdcfc4bb332c39ee5b9362ddd3d40d9516a55221b2/isodate-0.6.0-py2.py3-none-any.whl (45kB)
    100% |████████████████████████████████| 51kB 1.5MB/s 
Collecting pyparsing (from rdflib<5.0.0->extruct)
  Downloading https://files.pythonhosted.org/packages/8a/bb/488841f56197b13700afd5658fc279a2025a39e22449b7cf29864669b15d/pyparsing-2.4.7-py2.py3-none-any.whl (67kB)
    100% |████████████████████████████████| 71kB 2.1MB/s 
Collecting BeautifulSoup4>=4.6.0 (from mf2py->extruct)
  Downloading https://files.pythonhosted.org/packages/c2/39/1efce3dc73e657c43f436533d49be1491bf8fc830caa70188d73bfd03b8d/beautifulsoup4-4.9.1-py2-none-any.whl (111kB)
    100% |████████████████████████████████| 112kB 2.1MB/s 
Collecting html5lib>=1.0.1 (from mf2py->extruct)
  Downloading https://files.pythonhosted.org/packages/6c/dd/a834df6482147d48e225a49515aabc28974ad5a4ca3215c18a882565b028/html5lib-1.1-py2.py3-none-any.whl (112kB)
    100% |████████████████████████████████| 112kB 1.6MB/s 
Collecting requests>=2.18.4 (from mf2py->extruct)
  Downloading https://files.pythonhosted.org/packages/45/1e/0c169c6a5381e241ba7404532c16a21d86ab872c9bed8bdcd4c423954103/requests-2.24.0-py2.py3-none-any.whl (61kB)
    100% |████████████████████████████████| 71kB 1.5MB/s 
Collecting soupsieve<2.0 (from BeautifulSoup4>=4.6.0->mf2py->extruct)
  Downloading https://files.pythonhosted.org/packages/39/36/f35056eb9978a622bbcedc554993d10777e3c6ff1ca24cde53f4be9c5fc4/soupsieve-1.9.6-py2.py3-none-any.whl
Collecting webencodings (from html5lib>=1.0.1->mf2py->extruct)
  Downloading https://files.pythonhosted.org/packages/f4/24/2a3e3df732393fed8b3ebf2ec078f05546de641fe1b667ee316ec1dcf3b7/webencodings-0.5.1-py2.py3-none-any.whl
Collecting urllib3!=1.25.0,!=1.25.1,<1.26,>=1.21.1 (from requests>=2.18.4->mf2py->extruct)
  Downloading https://files.pythonhosted.org/packages/9f/f0/a391d1463ebb1b233795cabfc0ef38d3db4442339de68f847026199e69d7/urllib3-1.25.10-py2.py3-none-any.whl (127kB)
    100% |████████████████████████████████| 133kB 1.4MB/s 
Collecting chardet<4,>=3.0.2 (from requests>=2.18.4->mf2py->extruct)
  Downloading https://files.pythonhosted.org/packages/bc/a9/01ffebfb562e4274b6487b4bb1ddec7ca55ec7510b22e4c51f14098443b8/chardet-3.0.4-py2.py3-none-any.whl (133kB)
    100% |████████████████████████████████| 143kB 2.1MB/s 
Collecting certifi>=2017.4.17 (from requests>=2.18.4->mf2py->extruct)
  Downloading https://files.pythonhosted.org/packages/5e/c4/6c4fe722df5343c33226f0b4e0bb042e4dc13483228b4718baf286f86d87/certifi-2020.6.20-py2.py3-none-any.whl (156kB)
    100% |████████████████████████████████| 163kB 1.4MB/s 
Requirement already satisfied: idna<3,>=2.5 in /usr/lib/python2.7/dist-packages (from requests>=2.18.4->mf2py->extruct)
Collecting backports.functools-lru-cache; python_version < "3" (from soupsieve<2.0->BeautifulSoup4>=4.6.0->mf2py->extruct)
  Downloading https://files.pythonhosted.org/packages/da/d1/080d2bb13773803648281a49e3918f65b31b7beebf009887a529357fd44a/backports.functools_lru_cache-1.6.1-py2.py3-none-any.whl
Building wheels for collected packages: jstyleson, rdflib, mf2py, rdflib-jsonld
  Running setup.py bdist_wheel for jstyleson ... done
  Stored in directory: /root/.cache/pip/wheels/23/ac/3c/5c3d2849c2c9937c1d602b7ba099817c11bc5215abcd07ba4d
  Running setup.py bdist_wheel for rdflib ... done
  Stored in directory: /root/.cache/pip/wheels/8d/f6/b7/f5e9501d0f006fc9fd497c930206952856b2191ab5c836cb97
  Running setup.py bdist_wheel for mf2py ... done
  Stored in directory: /root/.cache/pip/wheels/7e/50/a1/7cd28816aacb3aac8185cd1184f5518fa5daae0484dc3674b4
  Running setup.py bdist_wheel for rdflib-jsonld ... done
  Stored in directory: /root/.cache/pip/wheels/8d/e4/7f/9ebcb3e400c694e645c3adba40ef3e9bda78384ac3b9b0d13d
Successfully built jstyleson rdflib mf2py rdflib-jsonld
Installing collected packages: jstyleson, isodate, pyparsing, rdflib, lxml, html-text, w3lib, backports.functools-lru-cache, soupsieve, BeautifulSoup4, webencodings, html5lib, urllib3, chardet, certifi, requests, mf2py, rdflib-jsonld, extruct
Successfully installed BeautifulSoup4-4.9.1 backports.functools-lru-cache-1.6.1 certifi-2020.6.20 chardet-3.0.4 extruct-0.10.0 html-text-0.5.2 html5lib-1.1 isodate-0.6.0 jstyleson-0.0.2 lxml-4.5.2 mf2py-1.1.2 pyparsing-2.4.7 rdflib-4.2.2 rdflib-jsonld-0.5.0 requests-2.24.0 soupsieve-1.9.6 urllib3-1.25.10 w3lib-1.22.0 webencodings-0.5.1

这一切都很好。 但是Jupyter Notebook（python）发出了一条错误消息：

import extruct as ext

 ---------------------------------------------------------------------------
ModuleNotFoundError                       Traceback (most recent call last)
<ipython-input-4-6eff935840a6> in <module>
----> 1 import extruct as ext

ModuleNotFoundError: No module named 'extruct' 

Answer 1

为了确保您是为“正确”的Python安装它，您可以尝试使用IPython magic命令在Jupyter中pip安装它

%pip install extruct

在Jupyter笔记本或控制台窗口内

使用pip安装的问题是，您的计算机上通常同时安装了几个不同版本的Python。您必须准确地找出Jupyter安装使用的是哪一个，并使用相应的pip

就我个人而言，出于这个原因，我试图坚持使用Anaconda装置。我总是使用~/anaconda3/bin/pip install [...]来安装软件包，然后运行~/anaconda3/bin/jupyter-lab（或者Spyder，或者IPython，具体取决于我当前需要什么）。这样，我确信这些库都安装在Python的特定安装上

Answer 2

在终点站

python3.7 -m pip install pip

用python

python3.7 -m pip install extruct