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Path: ...!fu-berlin.de!uni-berlin.de!not-for-mail From: Jonathan Gossage <jgossage@gmail.com> Newsgroups: comp.lang.python Subject: Dynamic classes Date: Mon, 19 May 2025 11:51:53 -0400 Lines: 14 Message-ID: <mailman.63.1747669953.3008.python-list@python.org> References: <CAApdmf3UwA6zf2-eSfd=1U=Unx3-6PUj6+XS0Sp62rkn73C8iQ@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" X-Trace: news.uni-berlin.de 8M1yiKecjuNHhEgqd0+dCQoA3+8A7FW8X/9msSNoKaJw== Cancel-Lock: sha1:EKw3/UTHiW9z4KVlzun+f3/MWXE= sha256:/kZOfdzseHcm3B9qkMx6DZE/N4M9DK27t2NJX/BWQW4= Return-Path: <jgossage@gmail.com> X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org Authentication-Results: mail.python.org; dkim=pass reason="2048-bit key; unprotected key" header.d=gmail.com header.i=@gmail.com header.b=am5VF6kA; dkim-adsp=pass; dkim-atps=neutral X-Spam-Status: OK 0.183 X-Spam-Level: * X-Spam-Evidence: '*H*': 0.66; '*S*': 0.02; 'fails': 0.09; 'instance': 0.16; 'variables,': 0.16; 'to:addr:python-list': 0.20; 'skip:_ 10': 0.22; 'present': 0.30; 'message-id:@mail.gmail.com': 0.31; 'subject:Dynamic': 0.32; 'received:google.com': 0.34; 'from:addr:gmail.com': 0.35; 'following': 0.35; 'using': 0.37; 'class': 0.37; '8bit%:14': 0.38; 'try': 0.40; 'skip:i 20': 0.62; '8bit%:9': 0.64; 'accept': 0.67; 'btw': 0.84; 'stating': 0.84 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1747669950; x=1748274750; darn=python.org; h=to:subject:message-id:date:from:mime-version:from:to:cc:subject :date:message-id:reply-to; bh=Cj6csy2qL4wNhw21kJLpN6d5qLQlvTVhtm8GQ3uBuMY=; b=am5VF6kATnII8qAF3kK/o0VFElUl1d1yOfpac5tSWcFTnaInQU8fsliADAYJLooooQ o4FCg3e0bDmPNX8oQ/LUhaSPcbWvBfQn/DzlYn4vrhiDjMFPIBGpuEwSWxhcnuyV8tVl 3iFYw0MLoyrL4qrkaM29lguSz8dQa4hDITcERiGUKySGuaJgriS7BhwGwjwPGRmmbZXk znQmcFPBbINyLnvRBw+x/T7mO+9O2VWEKJBdQGRo6xEJjKd4q3sTUGDpl5tGbsZuPfO4 RzeYjFUCXxyX6vyIOhLzNkuJGUUDpTItGvUMI2DjfZosqlOzWQvzjn49s+2TlyAkIi/U TS4w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1747669950; x=1748274750; h=to:subject:message-id:date:from:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=Cj6csy2qL4wNhw21kJLpN6d5qLQlvTVhtm8GQ3uBuMY=; b=WOBJCRbB+rbRmAM7tTcTyrQ9DTiNoBDzb97ZgBcBvFDgYiIMf/jMf+VDIcCaBJ9wkI HmRE94Dq4k3C98TNIaRyt4Q3K7MeG8XEciNn9knmM9VM5QMhqfD8iPBtMSGfgVCvcjTT 3jiEIcpBjyltT63t/bedkAg6kWriyw5lmUUVxdiUib4VSSc4FWSA5Y8COcNsG8uyV4WC Dvzy9lwnqpwJaN0ZPvlu6rUWKw94jDeqcMfefSLKjVEV9Fv8R0by6pE2GwSf4oIVctlQ uFObwQyHNjFHx4aneD4fae7SJr6STg6jkFlaFW20zXHdPu2oFm/a9DxMgV1nBOtNGZJ3 ZfSg== X-Gm-Message-State: AOJu0Yz+elcaeGu3ym0vnL7njLIDLO6BtBgXPKM1AF291VDfitbg+BOF J++LaHb/PBQ35B7NYE14X9zU7+n71VC1rRhwKHyUsi/+vS/xN+JcFSznd7SRQwkd5y7wVDTJYF7 qwusFrRRBMvw8RQdCdkuhPC7ljJS3cB2k0mC+eYk= X-Gm-Gg: ASbGncv1QkRBo5geQADRV+5mD6k9Ymwi+3yVzqyWwsdv4/3bs+4zeAAEIVl2VgFkiMi RvAjERxS0hmhee16eYYXWjqxxZKhUPDwEECNspgQ645g+KGIFzJfrHYkMQgb84Q6XHGpoJqyWLS Ef1osKw3s3olXPTOh4tCHQ15C2kpvmUJuCSIw= X-Google-Smtp-Source: AGHT+IFdN4HrWPm4qkJpfSjP9YLdM03MPW7JwlF7JMu1SXLgag7YBm0QhcinvGzRU0fWSg/NnLPO9HHsaBIS5OumTtU= X-Received: by 2002:a17:902:db07:b0:224:1001:677c with SMTP id d9443c01a7336-231de351468mr173559265ad.9.1747669950173; Mon, 19 May 2025 08:52:30 -0700 (PDT) X-Gm-Features: AX0GCFuTC-AI3opLHkfidR3Lq-L9REVISKjIF82qlvfK67GkNquW61No-AtToKI X-Content-Filtered-By: Mailman/MimeDel 2.1.39 X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.39 Precedence: list List-Id: General discussion list for the Python programming language <python-list.python.org> List-Unsubscribe: <https://mail.python.org/mailman/options/python-list>, <mailto:python-list-request@python.org?subject=unsubscribe> List-Archive: <https://mail.python.org/pipermail/python-list/> List-Post: <mailto:python-list@python.org> List-Help: <mailto:python-list-request@python.org?subject=help> List-Subscribe: <https://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe> X-Mailman-Original-Message-ID: <CAApdmf3UwA6zf2-eSfd=1U=Unx3-6PUj6+XS0Sp62rkn73C8iQ@mail.gmail.com> Bytes: 4815 I have created a dynamic class using the type() function: x = type('MyFlags', (), {'Flag1': 1, 'Flag2': 2, 'Flag3: 4, ' '__init__' : __init__}) The new class is there, and the class variables, Flag1, Flag2, and Flag3, are present correctly. However, when I try to create an instance of this class with the following code: y = x('Flag1', 'Flag2') it fails with a TypeError stating that 'MyFlags' does not accept arguments. What do I have to do to make this happen?. BTW __init__(self, *args) is defined as the instance initializer. -- Jonathan Gossage