尝试使用 VS Code 在虚拟环境中安装 Django 时出错，但出现错误

Question

我正在尝试学习 Django 并寻找一种安装它的方法，它说创建一个虚拟环境而不是全局安装它更好，所以我安装 pipenv 很好但是当我尝试在 pipenv 中安装 Django 时给了我这个错误，我在任何其他现有帖子中都找不到任何答案。

安装pipenv：

PS C:\Users\max25\Desktop\Python\learning_frameworks.py> pip install pipenv
Requirement already satisfied: pipenv in c:\users\max25\appdata\local\packages\pythonsoftwarefoundation.python.3.8_qbz5n2kfra8p0\localcache\local-packages\python38\site-packages (2020.6.2)
Requirement already satisfied: virtualenv in c:\users\max25\appdata\local\packages\pythonsoftwarefoundation.python.3.8_qbz5n2kfra8p0\localcache\local-packages\python38\site-packages (from pipenv) (20.0.25)
Requirement already satisfied: virtualenv-clone>=0.2.5 in c:\users\max25\appdata\local\packages\pythonsoftwarefoundation.python.3.8_qbz5n2kfra8p0\localcache\local-packages\python38\site-packages (from pipenv) (0.5.4)
Requirement already satisfied: certifi in c:\users\max25\appdata\local\packages\pythonsoftwarefoundation.python.3.8_qbz5n2kfra8p0\localcache\local-packages\python38\site-packages 
(from pipenv) (2020.6.20)
Requirement already satisfied: pip>=18.0 in c:\users\max25\appdata\local\packages\pythonsoftwarefoundation.python.3.8_qbz5n2kfra8p0\localcache\local-packages\python38\site-packages (from pipenv) (20.1.1)
Requirement already satisfied: setuptools>=36.2.1 in c:\program files\windowsapps\pythonsoftwarefoundation.python.3.8_3.8.1008.0_x64__qbz5n2kfra8p0\lib\site-packages (from pipenv) (41.2.0)
Requirement already satisfied: distlib<1,>=0.3.0 in c:\users\max25\appdata\local\packages\pythonsoftwarefoundation.python.3.8_qbz5n2kfra8p0\localcache\local-packages\python38\site-packages (from virtualenv->pipenv) (0.3.1)
Requirement already satisfied: appdirs<2,>=1.4.3 in c:\users\max25\appdata\local\packages\pythonsoftwarefoundation.python.3.8_qbz5n2kfra8p0\localcache\local-packages\python38\site-packages (from virtualenv->pipenv) (1.4.4)
Requirement already satisfied: filelock<4,>=3.0.0 in c:\users\max25\appdata\local\packages\pythonsoftwarefoundation.python.3.8_qbz5n2kfra8p0\localcache\local-packages\python38\site-packages (from virtualenv->pipenv) (3.0.12)
Requirement already satisfied: six<2,>=1.9.0 in c:\users\max25\appdata\local\packages\pythonsoftwarefoundation.python.3.8_qbz5n2kfra8p0\localcache\local-packages\python38\site-packages (from virtualenv->pipenv) (1.15.0)

尝试在 pipenv 中安装 Django 后出错

PS C:\Users\max25\Desktop\Python\learning_frameworks.py> pipenv install django
pipenv : The term 'pipenv' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was included, 
verify that the path is correct and try again.
At line:1 char:1
+ pipenv install django
+ ~~~~~~
    + CategoryInfo          : ObjectNotFound: (pipenv:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException

Answer 1

pipenv 不再被积极开发，也许poetry 会更好地满足您的需求。但是，如果你只是想用virtualenv来管理dependencies，我们可以直接用virtualenv。

$ pip install virtualenv
$ virtualenv django
$ source django/bin/activate
$ pip install django

使用source 命令后，如果您使用的是 linux，您将看到如下内容：

(django) $

这意味着你在你的虚拟环境中。

Answer 2

如果您有 Python 3.5 或更高版本。 创建虚拟环境就像在命令行中运行以下命令一样简单。 如果您在我使用的 Windows 上。

python -m venv name
#replace name with your custom name, or if you want to use name of current directory just use a dot (.)

#activate environment
Scripts/activate
#then use simple pip to install dependencies, if you have a requirement text file.
pip install -r ./requirements.txt
pip install django

Answer 3

我发现我第一次安装 Python 时没有将 Python 添加到路径中，所以我不得不重新安装 Python（所以是的，确实是路径错误）。