Python Pdb giving me a tracback and won't run
Question: I set the `Pdb` debugger in my file as I always do like so `import pdb;
pdb.set_trace()` and now I keep getting this traceback. I'm not sure what is
the issue, and I don't see anything online about this anywhere.

    
    
    Traceback (most recent call last):
      File "myfile.py", line 28, in <module>
        pdb.set_trace()
      File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/pdb.py", line 1251, in set_trace
        Pdb().set_trace(sys._getframe().f_back)
      File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/pdb.py",     line 63, in __init__
        cmd.Cmd.__init__(self, completekey, stdin, stdout)
    TypeError: __init__() takes at most 2 arguments (4 given)
    


Answer: Check whether you have your own `cmd.py`. That prevent import of standard
library [`cmd`](http://docs.python.org/2/library/cmd.html) module.

Try following command:

    
    
    python -c "import cmd; print(cmd.__file__)"
    

It should print something like:

    
    
    /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/cmd.py
    

or

    
    
    /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/cmd.pyc
    

If there's your own version of `cmd.py` or `cmd.pyc`, rename it.

