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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Aff `get_coefficients_by_name` intended behavior?","articleBody":"```python\r\nimport islpy\r\naff = islpy.Aff(\"[N] -\u003e { [x] -\u003e [x+1] } \")\r\naff.get_coefficients_by_name(dimtype=None)\r\n```\r\ngives\r\n\u003e isl_aff.c:763: output/set dimension does not have a coefficient\r\n\r\nAccording the doc, setting `dimtype` to None should produce the coefficients for all dimensions? \r\nI digged a little, in the generated _isl.py,\r\n``` \r\n_CHECK_DIM_TYPES = [\r\n        dim_type.in_, dim_type.param, dim_type.set]\r\n```\r\nwhich is used by `obj_get_coefficients_by_name` to retrieve the coefficients. When does Aff has a set dimension? Is this a bug or intended behavior?","author":{"url":"https://github.com/thisiscam","@type":"Person","name":"thisiscam"},"datePublished":"2020-03-03T07:33:29.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":3},"url":"https://github.com/24/islpy/issues/24"}