import re

import sys

MODULE_REGEX = r"^[_a-zA-Z][_a-zA-Z0-9]+$"

module_name = "{{ cookiecutter.package_slug}}"

if not re.match(MODULE_REGEX, module_name):

print(

"ERROR: The project slug (%s) is not a valid Python module name."

"Please do not use a - and use _ instead" % module_name

)

# Exit to cancel project

sys.exit(1)