input: Write a function to check if a given string contains any numbers. If it contains any numbers return True else return False. The function should take a single string as input.
  
  def string_contains_number(string):
      pattern = re.compile("[0-9]") 
      return pattern.search(string) != None
  
  assert string_contains_number("hello123")==True
  assert string_contains_number("world")==False
  assert string_contains_number("123abc")==True
  assert string_contains_number("abc456!")==True
  assert string_contains_number("")==False
output: def string_contains_number(string):
      pattern = re.compile("[0-9]") 
      return pattern.search(string) != None