input: Write a function to check if a given string contains any numbers. If it contains numbers, return True; otherwise, return False. Use regular expressions to search for numbers.
  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("12345")==True
  assert string_contains_number("")==False
  assert string_contains_number("abc1def")==True
output: def string_contains_number(string):
      pattern = re.compile("[0-9]") 
      return pattern.search(string) != None