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While I'm working on a migration, I like to keep my code idempotent.
I love that most operations offer an ignore argument.
I'd like one for create_index() too.
I can submit a PR but I'd like some discussion first.
Meanwhile I'm using this motif:
from contextlib import suppress
from sqlite_utils.db import OperationalError
with suppress(OperationalError):
mytable.create_index({'mycolumn'}, unique=True)
I could instead check to see whether the index already exists, but that's not Pythonic.
I should be checking the error message there really. More fine-grained exception classes would help here, so I could do this:
with suppress(IndexAlreadyExists):
mytable.create_index({'mycolumn'}, unique=True)
Where IndexAlreadyExists is a subclass of OperationalError. Separate issue though.
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