Please point out any mistakes.
Create a virtual environment called pythonenv (any name) You can also specify the version as you like.
$ conda create -n pythonenv python=3.8
Display a list of virtual environments
$ conda env list
Enable virtual environment for pythonenv
$ conda activate pythonenv
If you can't ↑, please try this.
$ source activate pythonenv
Install framework (flask)
$ conda install flask
View the list of installed frameworks
$ conda list
Exit the virtual environment you are currently using
$ conda deactivate
Erase virtual environment (pythonenv)
$ conda remove -n pythonenv --all
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