# Install virtualenv
pip install virtualenv
# Create env
virtualenv -p python3 env
import re
regexStr = r'^([^@]+)@[^@]+$'
emailStr = 'shubhamnath5@gmail.com'
username = re.search(regexStr, emailStr)
print(username.group(1))
#or
Version control is a system that records changes to a file or set of files over time so that you can recall specific versions later.
If you are a developer and want to keep every version of your code/project (which you would most certainly want to), a Version Control System (VCS) is a very wise thing to use.