On Wed, 30 May 2018 05:03:02 -0400, Terry Reedy wrote:
> On 5/30/2018 4:48 AM, Frank Millman wrote:
>> Hi all
>>
>> I want to work backwards to solve this problem, so I have to explain it
>> forwards to put you in the picture.
>>
>> I have an Ordered Dictionary. Under certain circumstances I am getting
>> this error -
>>
>> RuntimeError: OrderedDict mutated during iteration
>
> This should mean that the value associated with a key was sometimes
> changed.
I don't think so. It should be legal to iterate over a dict and change
the values. At least it works for me:
import random
from collections import OrderedDict
d = OrderedDict(zip(range(1, 10), "abcdefghi"))
for i in range(10000): # just in case of intermittent errors
for value in d.values():
d[random.randrange(1, 10)] = random.random()
I get no errors.
--
Steven D'Aprano
"Ever since I learned about confirmation bias, I've been seeing
it everywhere." -- Jon Ronson
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