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[英]How to correctly install python3 and virtualenv on MacOS Mojave?
[英]How to install and run virtualenv on MacOS correctly
嗨,我是python的初学者,我不记得我何时以及如何在我的Macbook air上安装python3.8,只知道安装路径:
% which python
/usr/bin/python
% which python3
/usr/local/bin/python3
找不到 pip 命令,但 pip3 没问题。 今天我想安装virtaulenv:
% sudo -H pip3 install virtualenv
WARNING: Ignoring invalid distribution - (/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages)
Successfully installed virtualenv-20.6.0
我可以使用“pip3 show virtualenv”来了解信息:
% pip3 show virtualenv
Name: virtualenv
Version: 20.6.0
Summary: Virtual Python Environment builder
Home-page: https://virtualenv.pypa.io/
Author: Bernat Gabor
Author-email: gaborjbernat@gmail.com
License: MIT
Location: /Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages
Requires: six, platformdirs, backports.entry-points-selectable, distlib, filelock
Required-by:
但是当我使用“virtualenv”时,我收到了未找到命令的消息,然后我“pip3卸载”了它。 我搜索了这个并得到了一个使用“easy_install”来安装 virtualenv 的提示。 安装后我可以执行命令,但收到一些错误消息:
% virtualenv
Traceback (most recent call last):
File "/usr/local/bin/virtualenv", line 6, in <module>
from pkg_resources import load_entry_point
File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/pkg_resources/__init__.py", line 3241, in <module>
@_call_aside
File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/pkg_resources/__init__.py", line 3225, in _call_aside
f(*args, **kwargs)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/pkg_resources/__init__.py", line 3254, in _initialize_master_working_set
working_set = WorkingSet._build_master()
File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/pkg_resources/__init__.py", line 583, in _build_master
ws.require(__requires__)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/pkg_resources/__init__.py", line 900, in require
needed = self.resolve(parse_requirements(requirements))
File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/pkg_resources/__init__.py", line 786, in resolve
raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'importlib-resources>=1.0' distribution was not found and is required by virtualenv
它似乎不起作用,我尝试使用“sudo pip3 uninstall virtualenv”来成功卸载它,但它似乎并没有真正被删除:
% which virtualenv
/usr/local/bin/virtualenv
我不知道这个,你能帮我吗? 我只想正常运行 virtualenv 并创建烧瓶项目...
附注。 我可以“sudo pip3 install flask”和“pip3 show flask”但仍然无法运行flask cammand(找不到命令),我该怎么办?
非常感谢!
尝试在您正在使用的 python 版本中进行明确,并使用-m pip
进行安装
python3 -m pip install virtualenv
python3 -m virtualenv venv # create a new venv in ./venv
source ./venv/bin/activate # activate your new venv
通常,pip/pip3 并不指向您认为正在使用的同一个 python 版本……通过使用这种技术,您肯定会使用正确的 python 和 pip
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