SICP-1.5-控制结构

测试

• DOCSETS
  • 在docstring中直接添加测试

  • def sum_naturals(n):
            """Return the sum of the first n natural numbers.
    
            >>> sum_naturals(10)
            55
            >>> sum_naturals(100)
            5050
            """
            total, k = 0, 1
            while k <= n:
                total, k = total + k, k + 1
            return total

  • 执行测试

  • >>> from doctest import run_docstring_examples
    >>> run_docstring_examples(sum_naturals, globals(), True)
    Finding tests in NoName
    Trying:
        sum_naturals(10)
    Expecting:
        55
    ok
    Trying:
        sum_naturals(100)
    Expecting:
        5050
    ok