input: Write a function to check if a given string contains any numbers. If the string contains any number, return True; otherwise, return False.
  def string_contains_number(string):
      pattern = re.compile("[0-9]") 
      return pattern.search(string) != None
  
  assert string_contains_number("hello123world") == True
  assert string_contains_number("helloworld") == False
  assert string_contains_number("123") == True
  assert string_contains_number("") == False
output: def string_contains_number(string):
      pattern = re.compile("[0-9]") 
      return pattern.search(string) != None