已经装了但依然显示no model

If you have already installed the `gymnasium` module using `pip` but are still unable to import it in your Python code, there could be a few reasons for this:

1. Make sure that you are using the correct name of the module in your `import` statement. The module name is case-sensitive, so double-check that you are using the correct capitalization.

2. Check that `pip` installed the module in the correct Python environment. If you are using a virtual environment, make sure that you have activated that environment before installing the module.

3. Ensure that the module is installed in a directory that is included in Python's `sys.path`. You can check this by running the following code in Python:

   import sys
   print(sys.path)

This will print a list of directories where Python searches for modules. Make sure that the directory where `gymnasium` is installed is included in this list.

If none of these solutions work, you may need to provide more information about your specific setup and the error message you are seeing in order to diagnose the issue.