Mention Debugging caveats like list comprehensions

[cstenkamp]

Due to scope, some things are predictably different in the "evaluate expression" part of the debugger

https://stackoverflow.com/questions/24149168/list-comprehension-scope-error-from-python-debugger https://stackoverflow.com/questions/51164288/ipython-debugger-raises-nameerror-name-is-not-defined I had a list of what is different somewhere but cannot seem to find it v.v