在Windows上激活Python虚拟环境

Barka 发表于 Dev

巴卡

注意：人们将其标记为另一个问题的重复，但事实并非如此。我的virtualenv出现了一些问题，我无法解决。它可能与Visual Studio的设置方式有关。

尝试在Windows上激活虚拟环境时遇到问题。你如何执行$ venv\Scripts\activate？这应该是从命令提示符还是Powershell？我已经使用Visual Studio作为我的IDE。它为您创建了一个具有基本烧瓶应用程序的VS解决方案。在创建应用程序的过程中，它会要求您创建一个虚拟环境。它在类似于本教程所示目录的目录中创建该虚拟环境。\venv\Scripts退出，但没有名为“激活”的文件或可执行文件。

这是“脚本”文件夹的内容：

api-ms-win-core-console-l1-1-0.dll api-ms-win-core-console-l1-1-0.dll

api-ms-win-core-debug-l1-1-0.dll

api-ms-win-core-errorhandling-l1-1-0.dll

api-ms-win-core-file-l1-1-0.dll api-ms-win-core-file-l1-2-0.dll

api-ms-win-core-file-l2-1-0.dll api-ms-win-core-file-l2-1-0.dll

api-ms-win-core-heap-l1-1-0.dll api-ms-win-core-heap-l1-1-0.dll

api-ms-win-core-libraryloader-l1-1-0.dll

api-ms-win-core-localization-l1-2-0.dll

api-ms-win-core-Memory-l1-1-0.dll api-ms-win-core-namedpipe-l1-1-0.dll

api-ms-win-core-processenvironment-l1-1-0.dll

api-ms-win-core-processthreads-l1-1-0.dll

api-ms-win-core-processthreads-l1-1-1.dll

api-ms-win-core-profile-l1-1-0.dll

api-ms-win-core-rtlsupport-l1-1-0.dll

api-ms-win-core-string-l1-1-0.dll api-ms-win-core-string-l1-1-0.dll

api-ms-win-core-synch-l1-2-0.dll api-ms-win-core-synch-l1-2-0.dll

api-ms-win-core-timezone-l1-1-0.dll api-ms-win-core-timezone-l1-1-0.dll

api-ms-win-crt-conio-l1-1-0.dll api-ms-win-crt-con1-1-.dll

api-ms-win-crt-environment-l1-1-0.dll

api-ms-win-crt-filesystem-l1-1-0.dll api-ms-win-crt-file-l1-1-0.dll

api-ms-win-crt-locale-l1-1-0.dll api-ms-win-crt-math-l1-1-0.dll

api-ms-win-crt-multibyte-l1-1-0.dll api-ms-win-crt-private-l1-1-0.dll

api-ms-win-crt-process-l1-1-0.dll api-ms-win-crt-process-l1-1-0.dll

api-ms-win-crt-stdio-l1-1-0.dll api-ms-win-crt-string-l1-1-0.dll

api-ms-win-crt-time-l1-1-0.dll api-ms-win-crt-utility-l1-1-0.dll

concrt140.dll msvcp140.dll pyexpat.pyd python.exe python3.dll

python36.dll pythoncom36.dll pythonw.exe pywintypes36.dll select.pyd

sqlite3.dll tcl86t.dll tk86t.dll ucrtbase.dll unicodedata.pyd

vccorlib140.dll vcomp140.dll vcruntime140.dll winsound.pyd

xlwings32.dll xlwings64.dll

_asyncio.pyd

_bz2.pyd

_ctypes.pyd

_ctypes_test.pyd

_decimal.pyd

_elementtree.pyd

_hashlib.pyd

_lzma.pyd

_msi.pyd

_multiprocessing.pyd

_overlapped.pyd

_socket.pyd

_sqlite3.pyd

_ssl.pyd

_testbuffer.pyd

_testcapi.pyd

_testconsole.pyd

_testimportmultiple.pyd

_testmultiphase.pyd

_tkinter.pyd

我一直到数据迁移部分，但是在这里我需要运行(venv) $ flask db migrate

我不知道如何进入虚拟环境来运行它。

格伦·G

这是我通过PowerShell在Windows上安装python时的CheatSheet。

首先从https://www.python.org/downloads/安装python 2.7x

然后将Python and Scripts文件夹添加到path变量（系统范围）

# Add Python and Python Scripts to path
$env:Path = [System.Environment]::GetEnvironmentVariable("Path", [System.EnvironmentVariableTarget]::Machine)
$PythonPath = "C:\Python27"
$PythonScriptsPath = "C:\Python27\Scripts"

if ($env:Path -notlike "*$PythonPath*") {
    $env:Path = $env:Path + ";$PythonPath"
}

if ($env:Path -notlike "*$PythonScriptsPath*") {
    $env:Path = $env:Path + ";$PythonScriptsPath"
}

# Save to machine path
[Environment]::SetEnvironmentVariable( "Path", $env:Path, [System.EnvironmentVariableTarget]::Machine )

# Check machine path
[System.Environment]::GetEnvironmentVariable("Path", [System.EnvironmentVariableTarget]::Machine)

然后通过pip安装virtualenv

pip install virtualenv

激活虚拟环境

virtualenv venv
. .\venv\Scripts\activate

如果使用Powershell，则该activate脚本应遵循系统上的执行策略。在Windows 7上，默认情况下，系统的执行策略设置为Restricted。为了使用脚本，您可以将系统的执行策略放宽到AllSigned，这意味着必须对系统上的所有脚本进行数字签名才能执行。以管理员身份运行：Set-ExecutionPolicy AllSigned

停用虚拟环境