Python: SyntaxError: 'return' outside function

[jinyangustc]

I'm using the default prelude python configuration and have a problem with 'Eval defun'. When I eval the def block (M-C-x), I got an error in the python shell:

SyntaxError: 'return' outside function

The test code are here:

def twoSum(nums, target):
    index = {}
    for i, val in enumerate(nums, 1):
        try:
            return index[target - val], i
        except:
            index[val] = i

I've also tried 'Eval region' and it works well.

Could you please help me with this problem?

[bbatsov]

That's likely a bug in python-mode or something.