在colab上运行gym的example时候,出现NameError: name ‘base‘ is not defined
解决办法:!aptinstallxvfb-y!pipinstallpyvirtualdisplay!pipinstallpigletimportgymimportnumpyasnpimportmatplotlib.pyplotaspltfromIPythonimportdisplayasipythondisplayfrompyvirtualdisplayimportDisplaydisplay=D