This function gives me unpredictable StopIteration error. I want to understand what causes such a bug. Cause it sometimes work and sometimes doesn't:
def prepare_dimensions(dimensions, dim_list):
for dimension in dimensions:
dimension['info'] = next(dim for dim in dim_list if dimension['id'] == dim['_id'])
StopIteration will be raised by next if it is given an empty iterable.
If any of your dimensions doesn't match anything in the dim_list you will get this error because the list comprehension will be empty. Similarly if dim_list is empty you will get this error.
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