为什么 doctest 在使用 tesfile 执行时找不到定义在同一文件上的函数？

Question

我有一个包裹 mypackage 我有 foo.py

# mypackage/foo.py
def foo():
    """
    >>> 1
    1

    >>> bar()
    'bar'
    """
    pass

def bar():
    return "bar"

如果我运行 python -m doctest mypackage/foo.py 它就像一个魅力，但是。如果我用 ...

创建一个测试文件

import doctest 
doctest.testfile("foo.py", package="mypackage")

... 在与 mypackage 相同的文件夹中，并且运行这个文件，它失败并显示

**********************************************************************
File "/Users/gecko/code/python/doctesttest/mypackage/foo.py", line 6, in foo.py
Failed example:
    bar()
Exception raised:
    Traceback (most recent call last):
      File "/Users/gecko/.pyenv/versions/3.8.2/lib/python3.8/doctest.py", line 1329, in __run
        exec(compile(example.source, filename, "single",
      File "<doctest foo.py[1]>", line 1, in <module>
        bar()
    NameError: name 'bar' is not defined
**********************************************************************
1 items had failures:
   1 of   2 in foo.py
***Test Failed*** 1 failures.
➜  doctesttest

我的问题是为什么，如何解决？

Answer 1

只需确保在运行 doctest 时导入 bar。例如，在同一目录中我有 example.txt 和 foo.py

# example.txt
>>> from foo import bar

>>> 1
1

>>> bar()
'bar'

# foo.py
def bar():
    return "bar"

现在 python 解释器将显示 0 个失败的测试行。

import doctest
doctest.testfile('example.txt')
>>> TestResults(failed=0, attempted=3)

但是，如果我省略行 >>> from foo import bar，我将得到以下错误

>>> doctest.testfile('example.txt')
**********************************************************************
File "./example.txt", line 6, in example.txt
Failed example:
    bar()
Exception raised:
    Traceback (most recent call last):
      File "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/doctest.py", line 1329, in __run
        exec(compile(example.source, filename, "single",
      File "<doctest example.txt[1]>", line 1, in <module>
        bar()
    NameError: name 'bar' is not defined
**********************************************************************
1 items had failures:
   1 of   2 in example.txt
***Test Failed*** 1 failures.
TestResults(failed=1, attempted=2)

为什么 doctest 在使用 tesfile 执行时找不到定义在同一文件上的函数？

Why doctest can't find functions defined on the same file when executed with tesfile?

python

doctest