input: Write a function to check if a given string contains any numbers. The function should return True if the string contains at least one number, and False otherwise.
  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("Python3")==True
  assert string_contains_number("NoNumbersHere")==False
  assert string_contains_number("")==False
output: def string_contains_number(string):
      pattern = re.compile("[0-9]") 
      return pattern.search(string) != None