+1 for any tool to reduce/simplify the number of imports. Everybody adds imports if something is missing, but nobody takes out imports after rewriting a module. Its not hard to find unused imports, as a random example sage/rings/polynomial/polynomial_rational_flint.pyx imports is_Polynomial but doesn't use it. But without manually searching around in the source code its hard to find which imports are seldomly-used and hence good candidates to move function/methods.
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