regex for validating email address python code example

Example: validate email regex python

# From mailtrap.io
# Validate a complex address with hyphens, underscores, periods, starting and ending with alphanumeric characters, and can have subdomains in address

^[a-z]([w-]*[a-z]|[w-.]*[a-z]{2,}|[a-z])*@[a-z]([w-]*[a-z]|[w-.]*[a-z]{2,}|[a-z]){4,}?.[a-z]{2,}$