input: Write a function to check if a given string contains any numbers. Return True if the string contains any numbers, otherwise return False.
  def string_contains_number(string):
      pattern = re.compile("[0-9]") 
      return pattern.search(string) != None
  
  assert string_contains_number("abc123")==True
  assert string_contains_number("abc")==False
  assert string_contains_number("a1b2c3")==True
  assert string_contains_number("hello world")==False
  assert string_contains_number("")==False
output: def string_contains_number(string):
      pattern = re.compile("[0-9]") 
      return pattern.search(string) != None