为什么机械化不能通过RPi上的pip正确安装？(python 3.9)

Question

我无法成功地在Raspberry Pi (所以，ARM芯片)上安装这个软件包，Debian，python3.9在虚拟环境中。

当我查看virtualenv的sitepackages文件夹时，机械化包实际上只有.dist-info文件，而不是mechanize.py文件或mechanize包文件夹。见下文。

问题：我是不是忽略了什么？

详细信息(1)：用pip安装机械

(venvtest) pi@mango:~/MyProject/myproj $ pip --version
pip 20.3.4 from /home/pi/MyProject/myproj/venvtest/lib/python3.9/site-packages/pip (python 3.9)

(venvtest) pi@mango:~/MyProject/myproj $ pip install mechanize
Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple
Collecting mechanize
Using cached https://www.piwheels.org/simple/mechanize/mechanize-0.4.8-py2.py3-none-any.whl (5.1 kB)
Requirement already satisfied: html5lib>=0.999999999 in /home/pi/MyProject/myproj/venvtest/lib/python3.9/site-packages (from mechanize) (1.1)
Requirement already satisfied: webencodings in /home/pi/MyProject/myproj/venvtest/lib/python3.9/site-packages (from html5lib>=0.999999999->mechanize) (0.5.1)
Requirement already satisfied: six>=1.9 in /home/pi/MyProject/myproj/venvtest/lib/python3.9/site-packages (from html5lib>=0.999999999->mechanize) (1.16.0)
Installing collected packages: mechanize
Successfully installed mechanize-0.4.8


(venvtest) pi@mango:~/MyProject/myproj $ pip list
Package       Version
------------- -------
html5lib      1.1
mechanize     0.4.8
pip           20.3.4
pkg-resources 0.0.0
setuptools    44.1.1
six           1.16.0
webencodings  0.5.1
wheel         0.34.2

详细信息(2)：站点中缺少的包文件夹

(venvtest) pi@mango:~/MyProject/myproj/ $ ls venvtest/lib/python3.9/site-packages
easy_install.py            pip-20.3.4.dist-info            __pycache__                   six.py                        wheel
html5lib                   pip-20.3.4.virtualenv           setuptools                    _virtualenv.pth               wheel-0.34.2.dist-info
html5lib-1.1.dist-info     pkg_resources                   setuptools-44.1.1.dist-info   _virtualenv.py                wheel-0.34.2.virtualenv
mechanize-0.4.8.dist-info  pkg_resources-0.0.0.dist-info   setuptools-44.1.1.virtualenv  webencodings
pip                        pkg_resources-0.0.0.virtualenv  six-1.16.0.dist-info          webencodings-0.5.1.dist-info

Details (3)：因此，导入机械化不起作用

(venvtest) pi@mango:~/MyProject/myproj $ python
Python 3.9.2 (default, Mar 12 2021, 04:06:34)
[GCC 10.2.1 20210110] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import mechanize
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'mechanize'
>>> exit()

Answer 1

这似乎是0.4.8版的一个问题。安装0.4.7版本很好：

pip install mechanize==0.4.7

可以看出：

(venvtest) pi@mango:~/MyProj/myproj $ python
Python 3.9.2 (default, Mar 12 2021, 04:06:34)
[GCC 10.2.1 20210110] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import mechanize
>>> print(mechanize.__version__)
(0, 4, 7, None, None)

我在机器github存储库打开了一张票：https://github.com/python-mechanize/mechanize/issues/76

Answer 2

我找到了一条线索：https://github.community/t/python-modulenotfounderror-although-module-is-installed-aiohttp/15425，这有用吗？