Put python doctest at the end of the code file?

Question

I can put python doctests in the bodies of each function, which I sometimes like for small libraries, because they are in the same file as the function.

Or I can put them all together into a seperate file and execute the separate file, which is nice in case I do not want the doctest in between the functions. Sometimes I find the code is easier to work on if the docstrings are small.

Is there also a way to keep the python doctests in the same file, but put them all together at the end of the file?

---

EDIT: A solution, based on the accepted answer below:

def hello_world():
  return u'Hello World'


def hello(name):
  return u'Hello %s' % name


def doctest_container():
  """
  >>> hello_world()
  u'Hello World'

  >>> hello(u'Guido')
  u'Hello Guido'
  """
  pass


if __name__ == "__main__":
    import doctest
    doctest.testmod()

In fact it is simple, a dummy function is created as the last function that contains all the doctests in one docstring.

Answer 1

You can append the doctests to the docstring at the end of file like that:

def myfunc():
    """This is a docstring without a doctest
    """
    pass

# ... some other code here

# Add docstrings for doctest:
myfunc.__doc__ += """
>>> myfunc()
>>> repr(myfunc())
None
"""

Answer 2

doctest is to test that examples in your documentation are in sync with the implementation.

if there are many tests; unit tests written as code might be easier to maintain than doctest-based tests.

You could add a test function at the end of the module with desired doctests to avoid polluting docstrings of non-test code:

def test():
    """
    ..
    """
    import doctest
    doctest.testmod()

if __name__=="__main__": 
    test()  # if the module is called as a script then run tests