TypeError: 'dict_keys' object does not support indexing
Clearly you're passing in d.keys() to your shuffle function. Probably this was written with python2.x (when d.keys() returned a list). With python3.x, d.keys() returns a dict_keys object which behaves a lot more like a set than a list. As such, it can't be indexed.
The solution is to pass list(d.keys()) (or simply list(d)) to shuffle.
You're passing the result of somedict.keys() to the function. In Python 3, dict.keys doesn't return a list, but a set-like object that represents a view of the dictionary's keys and (being set-like) doesn't support indexing.
To fix the problem, use list(somedict.keys()) to collect the keys, and work with that.
Convert an iterable to a list may have a cost. Instead, to get the the first item, you can use:
next(iter(keys))Or, if you want to iterate over all items, you can use:
items = iter(keys)while True: try: item = next(items) except StopIteration as e: pass # finish