flask env install
install virtualenv
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pip install virtualenv
install flask
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3virtualenv --no-download flask_env # create virtualenv no download
source flask_env/bin/activate
pip install flask # bask pkg
install flask ext
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5pip install flask-Bootstrap # bootstrap forward
pip install flask-Script # auto
pip install flask-Moment # locate time
pip install flask-WTF # form auth
pip install Flask-SQLAlchemy # database manager