{"description":"\u4ee5\u4e0b\u306e2\u3064\u306e\u51e6\u7406\u306e\u9055\u3044\u304c\u308f\u304b\u3089\u306a\u304b\u3063\u305f\u306e\u3067\u8abf\u3079\u3066\u307f\u307e\u3057\u305f\u3002 \u305d\u306e\uff11 df[\"hoge\"].astype(\"str\").str.zfill(12) \u305d\u306e\uff12 df[\"hoge\"].astype(str).str.zfill(12) \u51e6\u7406\u306e\u6bd4\u8f03 \u305d\u306e\uff11 astype(\"str\") \u306f NumPy \u306e dtype \"str\"\uff08\u56fa\u5b9a\u9577\u306e\u6587\u5b57\u5217\u578b\uff09\u3092\u6307\u5b9a\u3057\u3066\u304a\u308a\u3001\u5185\u90e8\u7684\u306b\u306f np.str_ \u578b\u306b\u306a\u308b\u3002 \u975e\u63a8\u5968\u3067\u306f\u306a\u3044\u304c\u3001Pandas \u3067\u306f Python \u306e\u7d44\u307f\u8fbc\u307f\u578b\u3092\u660e\u793a\u7684\u306b\u4f7f\u3046\u307b\u3046\u304c\u4e00\u822c\u7684\u3068\u306e\u3053\u3068\u3002 \u305d\u306e\uff12 astype(str) \u306f Python \u306e\u7d44\u307f\u8fbc\u307f\u95a2\u6570 str \u3092\u4f7f\u3063\u3066\u5909\u63db Pandas \u306e\u2026","type":"rich","url":"https://a1026302.hatenablog.com/entry/2025/07/03/171801","provider_url":"https://hatena.blog","author_url":"https://blog.hatena.ne.jp/a1026302/","blog_title":"\u3082\u306e\u3065\u304f\u308a\u306e\u30d6\u30ed\u30b0","categories":["Python","Python-pandas"],"image_url":"https://cdn.user.blog.st-hatena.com/default_entry_og_image/157314735/1599576939808917","width":"100%","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fa1026302.hatenablog.com%2Fentry%2F2025%2F07%2F03%2F171801\" title=\"\u3010Python\u3011astype(&quot;str&quot;)\u3068astype(str)\u306e\u9055\u3044\u306b\u3064\u3044\u3066\u8003\u3048\u3066\u307f\u308b - \u3082\u306e\u3065\u304f\u308a\u306e\u30d6\u30ed\u30b0\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","published":"2025-07-03 17:18:01","provider_name":"Hatena Blog","title":"\u3010Python\u3011astype(\"str\")\u3068astype(str)\u306e\u9055\u3044\u306b\u3064\u3044\u3066\u8003\u3048\u3066\u307f\u308b","height":"190","version":"1.0","author_name":"a1026302","blog_url":"https://a1026302.hatenablog.com/"}