input: Write a function that extracts all email addresses from a given string. Use a regular expression to identify and extract email addresses. If no email addresses are found, return an empty list.
  assert find_emails("This is an example with two emails: john@example.com, and jane@example.com")==["john@example.com", "jane@example.com"]
  assert find_emails("No emails here.")==[]
  assert find_emails("Multiple valid emails: info@website.com, support@company.org, admin@domain.net")==["info@website.com", "support@company.org", "admin@domain.net"]
  assert find_emails("Invalid email: abc@def@example.com")==[]
  assert find_emails("")==[]
output: import re
  
  def find_emails(text):
      pattern = r'\b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Z|a-z]{2,}\b'
      return re.findall(pattern, text)