Python doctest ValueError：“之后缺少空白”
Python doctest ValueError：“之后缺少空白”
提问于 2018-08-28 03:11:29
我有以下函数和docstring：
def vflip(self):
"""
Vertically flips the characters on this canvas.
>>> canvas = Canvas(4, 4)
>>> canvas.fill('.')
>>> canvas[0, 0] = 'A'
>>> canvas[1, 1] = 'B'
>>> canvas[2, 2] = 'C'
>>> canvas[3, 3] = 'D'
>>> print(canvas)
A...
.B..
..C.
...D
>>> canvas.vflip()
>>> print(canvas)
...D
..C.
.B..
A...
"""
for y in range(0, self.height // 2):
for x in range(0, self.width):
self._chars[x][y], self._chars[x][self.height - 1 - y] = self._chars[x][self.height - 1 - y], self._chars[x][y]
self._strDirty = True这会产生以下错误：
Traceback (most recent call last):
File "__init__.py", line 1332, in <module>
print(doctest.testmod())
File "C:\Users\Al\AppData\Local\Programs\Python\Python37\lib\doctest.py", line 1949, in testmod
for test in finder.find(m, name, globs=globs, extraglobs=extraglobs):
File "C:\Users\Al\AppData\Local\Programs\Python\Python37\lib\doctest.py", line 932, in find
self._find(tests, obj, name, module, source_lines, globs, {})
File "C:\Users\Al\AppData\Local\Programs\Python\Python37\lib\doctest.py", line 995, in _find
globs, seen)
File "C:\Users\Al\AppData\Local\Programs\Python\Python37\lib\doctest.py", line 1029, in _find
globs, seen)
File "C:\Users\Al\AppData\Local\Programs\Python\Python37\lib\doctest.py", line 982, in _find
test = self._get_test(obj, name, module, globs, source_lines)
File "C:\Users\Al\AppData\Local\Programs\Python\Python37\lib\doctest.py", line 1066, in _get_test
filename, lineno)
File "C:\Users\Al\AppData\Local\Programs\Python\Python37\lib\doctest.py", line 668, in get_doctest
return DocTest(self.get_examples(string, name), globs,
File "C:\Users\Al\AppData\Local\Programs\Python\Python37\lib\doctest.py", line 682, in get_examples
return [x for x in self.parse(string, name)
File "C:\Users\Al\AppData\Local\Programs\Python\Python37\lib\doctest.py", line 644, in parse
self._parse_example(m, name, lineno)
File "C:\Users\Al\AppData\Local\Programs\Python\Python37\lib\doctest.py", line 702, in _parse_example
self._check_prompt_blank(source_lines, indent, name, lineno)
File "C:\Users\Al\AppData\Local\Programs\Python\Python37\lib\doctest.py", line 789, in _check_prompt_blank
line[indent:indent+3], line))
ValueError: line 17 of the docstring for __main__.Canvas.vflip lacks blank after ...: '...D'我不确定为什么我会得到这个错误。其他StackOverflow帖子通常指出，>>>和该行上的代码之间没有空格，但这里不是这样。为什么我会得到这个错误？
回答 1
Stack Overflow用户
发布于 2018-08-28 03:11:29
这是一个特例，其中输出文本'...D'模仿其他Python提示符。交互式shell使用>>>作为常规提示，但多行语句中的任何其他行都使用...作为辅助提示。'...D'令人困惑的文档测试，并使它认为这是一个提示。
例如，请注意此基本代码中的两个提示：
>>> for i in range(5):
... print('Hello, world!')页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/52045637
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