pip install ipykernel -U 报错 error: externally-managed-environment

This error occurs because Python environment is managed by the operating system, preventing modifications to the system-wide installation using pip. To resolve this, you can create a virtual environment, which allows you to manage your own Python packages without affecting the system’s Python environment. Here are the steps:

1. Install the python3-venv package:

   sudo apt install python3-venv

2. Create a virtual environment:

   python3 -m venv myenv

3. Activate the virtual environment:

   source myenv/bin/activate

4. Install ipykernel in the virtual environment:

   pip install ipykernel -U

By using a virtual environment, you can install and manage Python packages without interfering with the system’s Python installation. If you need to exit the virtual environment, simply run:

deactivate

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