英文:

How to resolve "no Qt Platform Plugin could be initialized" for a Qt5 application?

问题

我正在开发一个基于 PyQt5 的 Python 应用程序。一切都很顺利，直到我重装了 Windows，因为遇到了一些问题。我已经复制了我的环境，重新安装了 Anaconda，然后再次将环境复制到 env 文件夹中。现在的问题是，当我在 PyCharm IDE 中运行我的代码时，它显示了一个错误对话框，内容如下：

我尝试过多种解决方案，比如：

解决方案1：更改 QT 文件位置

有时，像更改 QT 文件位置这样的简单技巧就足以摆脱错误。以下是操作步骤：

1. 打开文件资源管理器，进入此电脑。
2. 使用搜索栏，搜索 pyqt5_tools。
3. 当 Windows 完成搜索后，右键单击 pyqt5_tools，然后选择打开文件夹位置。
4. 进入 PyQt5 > Qt > bin。复制 platforms 文件夹。<kbd>在我的情况下，此文件夹中没有 bin 文件夹</kbd>。
5. 搜索 site-packages，然后打开该文件夹。
6. 在那里，粘贴 platforms 文件夹。
7. Windows 会警告你已经有一个同名文件夹。点击替换目标文件中的文件。

解决方案2：运行 SFC 扫描

有可能是因为系统文件损坏，导致 Windows 显示“应用程序无法初始化 QT 平台插件”错误。幸运的是，Windows 内置了一个工具来帮助你解决这个问题。

在开始菜单的搜索栏中，搜索命令提示符，然后选择以管理员身份运行。然后，运行 sfc /scannow 命令。Windows 会扫描并自动替换任何损坏的系统文件。

解决方案参考链接

对我来说都没用，我一直得到相同的错误。我该如何解决上图中显示的错误？ 任何帮助将不胜感激，谢谢。

英文:

I am working on a python application based on PyQt5. Everything was running good until I redo my PC and reinstall windows again because of some issue. I had copied my environment and after reinstalling Anaconda, I copied that environment again in env folder. Now the problem is that, when I run my code in PyCharm IDE, it displays and error dialog like this:

I have tried multiple solutions such as:

Solution 1: Change the QT Files Location

Sometimes, a simple trick such as changing the QT files location is enough to get rid of the error. Here’s how you can do it:

1. Launch File Explorer and open This PC.
2. Using the Search field, search for pyqt5_tools.
3. When Windows finishes the search, right-click the pyqt5_tools and head to Open folder location.
4. Head to PyQt5 > Qt > bin. Copy the platforms folder. <kbd>in my case bin is not available in this folder</kbd>
5. Make a new search for site-packages and open the folder.
6. There, paste the platforms folder.
7. Windows will warn you there’s already a folder with the same name. Click Replace the files in the destination.

Solution 2: Run an SFC Scan

There’s a chance Windows display the “Application failed because no QT platform plugin could be initialized” error due to corrupt system files. Fortunately, Windows has a built-in tool to help you fix the problem.

In the Start menu search bar, search for command prompt and select Run as administrator. Then, run the sfc /scannow command line. Windows will scan and automatically replace any corrupted system file.

Solutions Reference

Nothing worked for me, I'm getting the same error all the time.
How can I resolve the error displayed in the figure above?

Any help will be appreciated, Thanks.

答案1

得分: 0

对这个问题的更新答案
-----------------------------------

[答案参考][1]

  [1]: https://stackoverflow.com/questions/70896967/pycharm-has-no-qt-platform-plugin-could-be-initialized-error-when-using-matplotl

要将 PyQt5 的库路径添加到 PATH 环境变量中：

**1.** 打开 **`编辑环境变量`** 对话框。

**2.** 选择适当的 **`Path`** 变量（可以是 **用户** 或 **系统** 变量）。

   （注意：我在 **系统变量** 中做了更改）

**3.** 编辑变量并将 **`PyQt5`** 库路径添加为三个条目放在顶部。

**4.** **添加以下 3 个条目**，确保条目在 **所需顺序** 并且在 **路径变量的顶部**。

**5.** 保存更改。

```plaintext
C:\ProgramData\Anaconda3\envs\ann_tool\Lib\site-packages\PyQt5\Qt5\bin
C:\ProgramData\Anaconda3\envs\ann_tool\Lib\site-packages\PyQt5\Qt5\plugins
C:\ProgramData\Anaconda3\envs\ann_tool\Lib\site-packages\PyQt5\Qt5\plugins\platforms

6. 此外，如果你有一个名为：QT_PLUGIN_PATH 的变量，你希望将此行放在列表的 顶部：

C:\ProgramData\Anaconda3\envs\ann_tool\Lib\site-packages\PyQt5\Qt5\plugins

（注意：在我的情况下，Anaconda 是为所有用户安装的，因此，Anaconda 将位于 C:\ProgramData）

7. 一旦你保存了对环境变量的更改，需要重新启动 PyCharm，以便它能够识别并找到更新的库。

<details>
<summary>英文:</summary>

Updated Answer to this question
-----------------------------------

[Answer Reference][1]

  [1]: https://stackoverflow.com/questions/70896967/pycharm-has-no-qt-platform-plugin-could-be-initialized-error-when-using-matplotl

To add PyQt5&#39;s library path to your PATH environment variable:

**1.** Open the **`Edit Environment Variables`** dialog. 

**2.** Select the appropriate **`Path`** variable (either **User** or **System** variables). 

   (Note: I have changed in **`system variables`**)

**3.** Edit the variable and add the **`PyQt5`** library path as three entries at the top. 

**4.** **Add the following 3 entries**, and make sure the entries are in the **desired order** and at the **top of path** variable. 

**5.** Save the changes.

C:\ProgramData\Anaconda3\envs\ann_tool\Lib\site-packages\PyQt5\Qt5\bin
C:\ProgramData\Anaconda3\envs\ann_tool\Lib\site-packages\PyQt5\Qt5\plugins
C:\ProgramData\Anaconda3\envs\ann_tool\Lib\site-packages\PyQt5\Qt5\plugins\platforms

**6.** Also, if you have a variable named: **`QT_PLUGIN_PATH`**, you want to put this line at the **top of the list**:

C:\ProgramData\Anaconda3\envs\ann_tool\Lib\site-packages\PyQt5\Qt5\plugins

(Note: In my case, Anaconda is installed for all users so, Anaconda will be found in **`C:\ProgramData`**)

**7.** Once you have saved the changes to your environment variables, it is necessary to **Restart PyCharm** in order for it to recognize and locate the updated libraries..

</details>