$ brew install pyenv
$ pyenv --version
$ echo 'if which pyenv > /dev/null; then eval "$(pyenv init -)"; fi' >> ~/.bash_profile

$ pyenv install -l
$ pyenv install [Installation ver]
$ pyenv versions

$ pyenv global [Ver you want to use]
$ pyenv rehash
$ pyenv version
$ python3 --version

$ pyenv local [Ver you want to use]

$ pip install virtualenv

$ pyenv install -l
$ pyenv install [Anaconda ver]
$ pyenv global [Anaconda ver]
$ pyenv versions

$ conda create -n [Virtual environment name] python(=3.6) (anaconda)
$ conda info -e //Environment list
$ source activate [Virtual environment name] //Enter the virtual environment
$ source deactivate //Get out of the virtual environment
$ conda remove -n [Virtual environment name] --all //Delete virtual environment

$ cd [Working directory]
$ pyenv local [Anaconda ver]/envs/[Virtual environment name]
$ echo 'alias activate="source [User directory]/versions/anaconda3-4.4.0/bin/activate"' >> ~/.bash_profile
$ source ~/.bash_profile
$ activate //Enter the virtual environment

$ activate [Virtual environment name]
$ python [file name].py

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