Скачать или смотреть Fixing the ImportError: libgl.so.1 Cannot Open Shared Object File in OpenCV on Ubuntu

Learn how to resolve the ImportError related to `libgl.so.1` when using OpenCV with Python on Ubuntu. Here’s a step-by-step guide to fix the issue smoothly!
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How to Fix the ImportError: libgl.so.1 Cannot Open Shared Object File When Using OpenCV on Ubuntu

If you've recently run into the frustrating ImportError: libGL.so.1: cannot open shared object file: No such file or directory while trying to use OpenCV in Python, you're not alone. This error appears particularly when working in Ubuntu environments, especially when using Anaconda for package management. In this post, we’ll break down the issue and walk you through a simple fix to get OpenCV working smoothly again.

Understanding the Problem

The error you encounter when trying to import OpenCV (cv2) generally indicates that required libraries, in this case, libGL.so.1, are missing or not properly linked. This can occur in various scenarios, such as after installations, updates, or when the library dependencies are not accurately set up.

The environment where this error occurred includes:

OS: Ubuntu 16.04

Python: 3.7.8

Conda: Anaconda3

CUDA: 10.0

Key Symptoms:

You see an error message with a traceback when attempting to import cv2.

Despite attempting to install libgl1-mesa-glx, the error persists.

Step-by-Step Solution to Resolve the ImportError

Follow these steps to fix the ImportError and successfully use OpenCV in your Python environment.

1. Locate the libGL.so.1 File

First, you need to confirm whether the library file exists in your system. Open your terminal and run the following command:

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This command will help you find the location of libGL.so.1 on your system.

2. Create a Soft Link

Once you have located the file (e.g., /usr/lib/x86_64-linux-gnu/mesa/libGL.so.1), the next step is to create a symbolic link to this file in the /usr/lib directory. This ensures that the system can find the library when required by OpenCV. Execute the following command in your terminal:

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Creating this link effectively resolves the path issue, allowing the system to recognize the library correctly.

3. Verify the Installation

Now, it’s time to check if everything is set correctly. Open the Python interpreter and try importing the cv2 module again:

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If there are no errors, congratulations! You've successfully resolved the ImportError.

Additional Considerations

If you continue facing issues even after following these steps, consider the following additional measures:

Reinstall OpenCV: If the problem persists, you might want to reinstall OpenCV via conda or pip.

Verify Library Dependencies: Ensure all necessary dependencies are installed correctly. The following packages are typically required:

libgl1-mesa-glx

ffmpeg

libsm6

libxext6

Using apt-get to install or reinstall these packages might help.

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Conclusion

Encountering technical issues can be frustrating, especially with environments that have multiple dependencies and libraries like OpenCV. However, the steps outlined here will assist you in resolving the ImportError: libGL.so.1 quickly and efficiently. If you have any further questions or alternative solutions, feel free to share it in the comments! Happy coding!