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py -m install pandas
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//to create the virtual environment in windows
python -m venv env
// or
python3 -m venv env
//to activate virtual environment in windows
source env/Scripts/activate
//to disable virtual environment in windows
deactivate
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### install library `virtualenv`
$ pip3 install virtualenv
### call module `venv` with the name for your environment
$ python3 -m venv venv_name
### activate the created environment
$ source venv_name/bin/activate #key step
### install the packages
(venv_name) user@host: pip3 install "package-name"
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//create the virtual environment for Mac and Linux
python -m venv env
// or
python3 -m venv env
//activate virtual environment for Mac and Linux
source env/bin/activate