Python 3.5：TypeError：__ init __（）得到了一个意外的关键字参数'nosigint'

Question

I am using Python 3.5 to do doctest. There is always an error:

  File "D:\Program Files\Anaconda\lib\doctest.py", line 357, in __init__
    pdb.Pdb.__init__(self, stdout=out, nosigint=True)

TypeError: __init__() got an unexpected keyword argument 'nosigint'

It seems that the error occurs in the doctest.py file, but not in my own code.

I hope to define a class which is similar to dict. My code is:

class Dict(dict):
    '''
    Simple dict but also support access as x.y style.

    >>> d1 = Dict()
    >>> d1['x'] = 100
    >>> d1.x
    100
    >>> d1.y = 200
    >>> d1['y']
    200
    >>> d2 = Dict(a=1, b=2, c='3')
    >>> d2.c
    '3'
    >>> d2['empty']
    Traceback (most recent call last):
        ...
    KeyError: 'empty'
    >>> d2.empty
    Traceback (most recent call last):
        ...
    AttributeError: 'Dict' object has no attribute 'empty'
    '''
    def __init__(self, **kw):
        super(Dict, self).__init__(**kw)

    def __getattr__(self, key):
        try:
            return self[key]
        except KeyError:
            raise AttributeError(r"'Dict' object has no attribute '%s'" % key)

    def __setattr__(self, key, value):
        self[key] = value

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

Can you help me with this?

Answer 1

It looks like you are using the Anaconda Python distribution.

Are you running using the Spyder IDE?

There is an open bug in Spyder's issue tracker.

The suggested work-around involves modifying the source of pdb and doctest .

For a shoddy quick fix you can remove the

nosigint=True argument from the pdb.Pdb.init in doctest.py

and change the default value of nosigint to True in pdb.py

if you are being affected by this bug, you can encourage the folk who make Spyder to fix it by Subscribing to Notifications about this issue on GitHub

Answer 2

There is another potential solution that I have used to work around this bug. You can add an __init__ method to the SpyderPdb class that sets a default value for the missing nosigint argument.

I'm using the WinPython distribution to get Spyder, but it's probably something similar for Anaconda. For Python 3.5+ it's in: \\WinPython...\\python...\\Lib\\site-packages\\spyder\\utils\\site\\sitecustomize.py

For earlier versions it might be in ...\\Lib\\site-packages\\spyderlib\\widgets\\externalshell\\sitecustomize.py

class SpyderPdb(pdb.Pdb):
    def __init__(self, completekey='tab', stdin=None, stdout=None, skip=None, nosigint=False):
        super(pdb.Pdb, self).__init__()

Answer 3

（ Spyder开发人员 ）这个问题将在Spyder 3.1.4中修复，将于2017年3月中旬发布。