文档测试不运行测试，

Question

import doctest 

def create_grid(size): 
    grid = [] 
    for i in range(size): 
     row = ['0']*size 
     grid.append(row) 
    """ 
    >>> create_grid(4) 
    [['0', '0', '0', '0'], ['0', '0', '0', '0'], 
    ['0', '0', '0', '0'], ['0', '0', '0', '0']] 
    """ 
    return grid 

if __name__ == '__main__': 
    doctest.testmod() 

运行上面python Test_av_doctest.py -v提供了以下消息：

2 items had no tests: 
    __main__ 
    __main__.create_grid 
0 tests in 2 items. 
0 passed and 0 failed. 
Test passed. 

为什么会出现此错误的任何想法？

Answer 1

问题是您的doctest格式的字符串不是文档字符串。

Which docstrings are examined?

The module docstring, and all function, class and method docstrings are searched.

如果您将函数定义下面的测试字符串，它会成为一个函数文档字符串，因此将通过doctest针对性：

def create_grid(size): 
    """ 
    >>> create_grid(4) 
    [['0', '0', '0', '0'], ['0', '0', '0', '0'], 
    ['0', '0', '0', '0'], ['0', '0', '0', '0']] 
    """ 
    grid = [] 
    for i in range(size): 
     row = ['0']*size 
     grid.append(row) 

    return grid 

if __name__ == '__main__': 
    doctest.testmod() 

---

$ python Test_av_doctest.py -v 
... 
1 passed and 0 failed. 
Test passed.