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Title: refactor: delay import of pandas until needed by tlambert03 · Pull Request #87 · scijava/scyjava · GitHub

Open Graph Title: refactor: delay import of pandas until needed by tlambert03 · Pull Request #87 · scijava/scyjava

X Title: refactor: delay import of pandas until needed by tlambert03 · Pull Request #87 · scijava/scyjava

Description: While working on #86, I noticed that scyjava was greedily importing pandas, even when it wasn't being used. Pandas is somewhat large and can slow down startup; so it would be nice to delay that until we know we need it. The traditional pattern of try import just to know whether something is importable can be improved: if you want to know whether something is importable, you can use importlib.util.find_spec if you want to know whether someone has already imported something (e.g. to check whether some user object is an instance of some third-party type, without unnecessary import), you can look in sys.modules: sys.modules.get('pandas') this PR removes the _import_X(required=False) pattern in place of importlib.util.find_spec

Open Graph Description: While working on #86, I noticed that scyjava was greedily importing pandas, even when it wasn't being used. Pandas is somewhat large and can slow down startup; so it would be nice to delay tha...

X Description: While working on #86, I noticed that scyjava was greedily importing pandas, even when it wasn't being used. Pandas is somewhat large and can slow down startup; so it would be nice to delay...

Opengraph URL: https://github.com/scijava/scyjava/pull/87

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9e33f2e refactor: delay import of pandas until needed tlambert03 Aug 23, 2025 https://patch-diff.githubusercontent.com/scijava/scyjava/pull/87/commits/9e33f2ed350973b4e657634290e7d75824d635e4
6f89935 remove reveal type tlambert03 Aug 23, 2025 https://patch-diff.githubusercontent.com/scijava/scyjava/pull/87/commits/6f89935091be21f25af75214d6d28de1efcd68b2
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