Serhiy Storchaka added the comment:

The problem with the *depth* parameter is that it adds a burden of choosing the 
value for the end user. "Oh, there are more deeper code objects, I must 
increase the depth and rerun dis()!" I think in most cases when that parameter 
is specified it would be set to some large value like 999 because you don't 
want to set it too small. Compare for example with the usage of the attribute 
maxDiff in unittests.

The single depth parameter doesn't adds too much control. You can't enable 
disassembling functions and method bodies but disable disassembling 
comprehensions in functions. If you need more control, you  should use 
non-recursive dis() and manually walk the tree of code objects.

How much output adds unlimited recursion in comparison with the recursion 
limited by the first level?

As for supporting invalid bytecode, currently the dis module doesn't support it 
(see issue26694).

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue11822>
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