You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: resolver.go
    path of file: ./repos/grype/grype/db/v4/pkg/resolver/python
    
    the code of the file until where you have to start completion: package python

import (
	"regexp"
	"strings"

	grypePkg "github.com/anchore/grype/grype/pkg"
)

type Resolver struct {
}

func (r *Resolver) Normalize(name string) string {
	// Canonical naming of packages wi
    
func (r *Resolver) Normalize(name string) string {
	// Canonical naming of packages within python is defined by PEP 503 at
	// https://peps.python.org/pep-0503/#normalized-names, and this code is derived from
	// the official python implementation of canonical naming at
	// https://packaging.pypa.io/en/latest/_modules/packaging/utils.html#canonicalize_name

	return strings.ToLower(regexp.MustCompile(`[-_.]+`).ReplaceAllString(name, "-"))
}