input: Write a function to check if a given string contains any numbers. If it contains numbers return True else return False.
  assert string_contains_number("abc123")==True
  assert string_contains_number("abcde")==False
  assert string_contains_number("123abc")==True
  assert string_contains_number("a1b2c3")==True
  assert string_contains_number("")==False
output: def string_contains_number(s):
      return any(char.isdigit() for char in s)