input: from typing import List
  
  def find_matches(query: str, choices: List[str], threshold: int) -> List[str]:
      """
      Finds all strings in the choices list that are similar to the query string 
      based on the Levenshtein distance within the given threshold.
      
      >>> find_matches('apple', ['apple', 'apples', 'aple', 'banana'], 2)
      ['apple', 'apples', 'aple']
      >>> find_matches('fuzzy', ['frizzy', 'fuzy', 'fuzz', 'fizzy'], 1)
      ['frizzy', 'fuzy', 'fuzz', 'fizzy']
      """
output:     from Levenshtein import distance
      return [choice for choice in choices if distance(query, choice) <= threshold]