あなたの知らないNumPyの世界〜2025年版NumPy怪談〜

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1. 2026/2/19 ΈΜͳͷPythonษڧձ Ճ౻ެҰ Horror Story In NumPy ͋ͳͨͷ஌Βͳ͍NumPyͷੈք ʙ2025೥൛NumPyոஊʙ
2. ࣗݾ঺հ Ճ౻ެҰʢ͔ͱ͏͖Έ͔ͣʣ X: @hamukazu झຯɿ͍ܰےτϨ ஶॻ New!
3. ϓϩϩʔά ڈ೥3݄ɺ৽͍͠Mac Book ProΛങ͍·ͨ͠
4. ࣥචͷͨΊNumPyΛ͍ͬͯͨ͡Β͜Μͳ໰୊͕ >>> np.eye(15) @ np.eye(15) <python-input-2>:1: RuntimeWarning: divide by zero encountered in matmul np.eye(15) @ np.eye(15) <python-input-2>:1: RuntimeWarning: overflow encountered in matmul np.eye(15) @ np.eye(15) <python-input-2>:1: RuntimeWarning: invalid value encountered in matmul np.eye(15) @ np.eye(15)
5. ෮शɿߦྻͷੵ ͷͱ͖ ֻ͚ࢉͱ଍͠ࢉ͔͍ͯ͠͠ͳ͍ Devision by Zero͕ى͜Δ͸͕ͣͳ͍ʂʂ
6. ৺ྶݱ৅ʁ
8. GitHubͷIssue https://github.com/numpy/numpy/issues/28687
9. ঱ঢ়·ͱΊ • NumPy2.2.4Ͱɺߦྻͷ@ԋࢉࢠͰDivision by Zeroܯࠂ • M4 Mac͚ͩͰ࠶ݱ • np.eye(14) @ np.eye(14)Ͱ࠶ݱͤͣɺnp.eye(15) @ np.eye(15)Ͱ࠶ݱ • @ԋࢉࢠͰ࠶ݱ͢Δ͕ɺnp.dotͰ࠶ݱͤͣ • όοΫΤϯυΛOpenBLASʹมߋ͢Δͱ࠶ݱͤͣ
10. ݪҼ • M4͔ΒSMEʢScalable Matrix Extensionʣͱ͍͏ߦྻܭࢉઐ༻ͷ໋ྩηοτ ͕ಋೖ͞Εͨ • SME͕ݺͼग़͞ΕΔͱྫ֎ϑϥά͕શ෦1ʹͳΔʢͦͷ࢓༷Ͳ͏ͳͷΑʁʣ • NumPy͕ͦͷϑϥάΛಡΜͰWarning
11. ·ͱΊ • NumPy͸ΪϦΪϦ·ͰύϑΥʔϚϯενϡʔχϯά͍ͯ͠ΔͷͰɺCPUͷ࢓ ༷มߋͷӨڹΛड͚Δ͜ͱ͕͋Δ • GitHubͷIssueͷٞ࿦ΛಡΉͷ͸ָ͍͠ʂ