File "C:\Users\jlagg\stackprinter\demo.py", line 46, in <module>
    43       anotherlist = [['5', 6]]
    44       spam = numpy.zeros((3,3))
    45       supersecret = "you haven't seen this"
--> 46       dangerous_function(somelist + anotherlist)
    47   except:
    ..................................................
     anotherlist = [['5', 6]]
     spam = 
 
 [[0. 0. 0. ...  
 array([[0., 0., 0.],
       [0., 0., 0.],
       [0., 0., 0.]]) 
     supersecret = *****
     somelist = 
 
 [[1, 2], [ ...  
 [[1, 2], [3, 4]] 
    ..................................................

File "C:\Users\jlagg\stackprinter\demo.py", line 6, in dangerous_function
    5    def dangerous_function(blub):
--> 6        return sorted(blub, key=lambda xs: sum(xs))
    ..................................................
     blub = 
 
 [[1, 2], [ ...  
 [[1, 2], [3, 4], ['5', 6]] 
    ..................................................

File "C:\Users\jlagg\stackprinter\demo.py", line 6, in <lambda>
    3    
    4    
    5    def dangerous_function(blub):
--> 6        return sorted(blub, key=lambda xs: sum(xs))
    7    
    ..................................................
     xs = ['5', 6]
    ..................................................

TypeError: unsupported operand type(s) for +: 'int' and 'str'