DMARC-Filter: OpenDMARC Filter v1.4.2 delorie.com 597IY03k3810697 Authentication-Results: delorie.com; dmarc=pass (p=none dis=none) header.from=cygwin.com Authentication-Results: delorie.com; spf=pass smtp.mailfrom=cygwin.com DKIM-Filter: OpenDKIM Filter v2.11.0 delorie.com 597IY03k3810697 Authentication-Results: delorie.com; dkim=pass (1024-bit key, unprotected) header.d=cygwin.com header.i=@cygwin.com header.a=rsa-sha256 header.s=default header.b=up9M/6M8 X-Recipient: archive-cygwin AT delorie DOT com DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 95F54385087E DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cygwin.com; s=default; t=1759862038; bh=u0S3EX3Gi1+5R2SzB/kCUkJ1d8CFZj+IfSE975ADe+w=; h=Date:Subject:To:References:In-Reply-To:List-Id:List-Unsubscribe: List-Archive:List-Post:List-Help:List-Subscribe:From:Reply-To:Cc: From; b=up9M/6M8OEDVuLdI5SwSvNcFAdll8SsJ71bzrerPMLgjzwNwO1nz19LCJ+VL1yAyP luNlOv3pdd7mCWIhn2QYA8hZnpeCy4HXwr0uRd8hIKG2Q5MivsJaKyRqNmAFxIpbgj THjGcnZ8AERCbc06xj6xL3Z5l4nVQ4qVAJuB6UCc= X-Original-To: cygwin AT cygwin DOT com Delivered-To: cygwin AT cygwin DOT com DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 9CCAA3858401 ARC-Filter: OpenARC Filter v1.0.0 sourceware.org 9CCAA3858401 ARC-Seal: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1759862013; cv=none; b=GJ8M4CWecAtejWiliF4os7wFoNep9WC5P5Drszwc4ug5+2/cY1B0aAqU6qbiJyjZGQ+ijss7MslL7P6NkLJ/b65z+dgNREWo5QYwSbjR7X4UWcauhJhTfJ8zZi/BUdeIagTkFT/y2Nz9E53GMypoESlJMTwMi18ud8c3wI2LA28= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1759862013; c=relaxed/simple; bh=3IW11WnJ6IPgdW1kVd4YB0pYKd4WJ9kn2nX/744oVRM=; h=Message-ID:Date:MIME-Version:From:Subject:To:DKIM-Signature; b=h+YYbp17rKJPMm3AreIRQcCGOex3R/EbYi9f1dNs6GvCihDudF8qyZBQZQf+mAwPePAcX1H+Fh4dprAiaArcudCSge3nXwtRNr/QgIXy2EpHvUCiV4cf/owssvRo+9MqOD+sq/vOcOSQqfiTcJ5iw/S6Vq+6dBYlU/IPfy1ZKs8= ARC-Authentication-Results: i=1; server2.sourceware.org DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 9CCAA3858401 Message-ID: Date: Tue, 7 Oct 2025 12:33:30 -0600 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: C:\cygwin64\bin\python3 doesn't work from cmd To: cygwin AT cygwin DOT com References:

<56ae1349-bb9a-47a5-9824-85bdcf0f0259 AT towo DOT net> Content-Language: en-CA Organization: Systematic Software In-Reply-To: <56ae1349-bb9a-47a5-9824-85bdcf0f0259@towo.net> X-Stat-Signature: nujfs8ej479cw31apqb45y6ghzmgkn3w X-Rspamd-Server: rspamout03 X-Rspamd-Queue-Id: C3F7F2000E X-Session-Marker: 427269616E2E496E676C69734053797374656D6174696353572E61622E6361 X-Session-ID: U2FsdGVkX18ZpKX/Pweb+Hp5ey8B6Kk0QkZCTTYuP2c= X-HE-Tag: 1759862011-555673 X-HE-Meta: U2FsdGVkX18buSXPu8N7uGZMNwjlsE+UJNh8bwxfjRIYXWfosqzSqXxL+kdsxcPeRyQW5/asUbpkG4fszpB8j8zGB/x2XWKoYgKhlcmesMRdunoKF2tGcaeTGYdCeaf7OEjYOWlPA4TZgxZAxKtqNWMlrUypRN8FC0dQhUDri7fEkVkebJ+6zTgwZdFj6VsABoXBK0TSfEdUK50juRbKV9+NqBEV/smBEMc9uZpBc99ERYcXEbKQp+vXpegMpL9jHpfnJ6ruTZXbYjam6NmL3jDp5Vof3syaaGOyykB0aQw10ryz4MIVomBiwy65H91C2lwc8fgQjExwKwHuaO88B5/gTuTDxk4vsKMlcb5kaAZ2kpv+JuCAao3x1RmeZ8Cm/6Uqo+QSUo62atZIf2TxCg== X-BeenThere: cygwin AT cygwin DOT com X-Mailman-Version: 2.1.30 Precedence: list List-Id: General Cygwin discussions and problem reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Brian Inglis via Cygwin Reply-To: cygwin AT cygwin DOT com Cc: Brian Inglis Content-Type: text/plain; charset="utf-8"; Format="flowed" Errors-To: cygwin-bounces~archive-cygwin=delorie DOT com AT cygwin DOT com Sender: "Cygwin" Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from base64 to 8bit by delorie.com id 597IY03k3810697 On 2025-10-07 07:59, Thomas Wolff via Cygwin wrote: > > Am 07.10.2025 um 15:51 schrieb Aurélien Couderc via Cygwin: >> On Tue, Oct 7, 2025 at 3:47 PM Marco Atzeri via Cygwin >> wrote: >>> On 07/10/2025 14:17, gamer 191 via Cygwin wrote: >>>> Hi, >>>> I noticed that C:\cygwin64\bin\python3 doesn't work if I invoke it from >>>> command prompt, likely because it doesn't have the .exe extension. It works >>>> if I create a copy named python3.exe. >>>> Kind regards, >>>> gamer191 >>>> >>> Hi Gamer >>> >>> python3 is a Cygwin link managed by alternatives and NOT understood by >>> command prompt. >>> >>> >>> $ ls -l python3 >>> lrwxrwxrwx 1 marco Administrators 25 May 21 2023 python3 -> >>> /etc/alternatives/python3 >>> >>> $ alternatives --display python3 >>> python3 - status is auto. >>> link currently points to /usr/bin/python3.9 >>> /usr/bin/python3.8 - priority 38 >>> /usr/bin/python3.9 - priority 39 >>> Current `best' version is /usr/bin/python3.9. >>> >>> From CMD you need to invoke directly the relative python3.9.exe >>> >>> c:\cygwin64\bin>dir /A /S python3*.* >>> Volume in drive C is OS >>> Volume Serial Number is 2232-4AA9 >>> >>> Directory of c:\cygwin64\bin >>> >>> 21/05/2023 20:47 64 python3 >>> 21/05/2023 20:48 78 python3-config >>> 10/03/2023 00:34 3,420 python3.8-config >>> 10/03/2023 00:34 9,747 python3.8.exe >>> 08/03/2023 23:52 3,048 python3.9-config >>> 08/03/2023 23:53 9,747 python3.9.exe >>> 8 File(s) 38,879 bytes >> Could the setup.exe Cygwin installer PLEASE get a GUI(!!) option to >> install packages using native Windows symlinks? That would fix that >> recurring problem. It would not - some executables are scripts so Windows has no way to run them anyway without some Cygwin interface. > It would also help, and not need such problematic reconfiguration, if ln -s did > set up a symlink as .exe if it points to a .exe, like: > ln -s python3.9 /bin/pythonlink > ls -l /bin/pythonlink* > ... /bin/pythonlink.exe -> python3.9.exe > Packages could also ensure this themselves with > ln -s python3.9.exe /bin/pythonlink.exe Then shell users may have to specify .exe on many things, including changing every script, none of which specify exe - no thanks! Most of us just want a seamless POSIX experience, regardless of system, and be able to move scripts and sources from one to the other, and back. Use a Cygwin terminal and/or shell, or deal with the incompatibilities, such as by creating your own *non-conflicting* native Windows symlinks including .exe: if that breaks something - you have to deal with it - no one else! -- Take care. Thanks, Brian Inglis Calgary, Alberta, Canada La perfection est atteinte Perfection is achieved non pas lorsqu'il n'y a plus rien à ajouter not when there is no more to add mais lorsqu'il n'y a plus rien à retrancher but when there is no more to cut -- Antoine de Saint-Exupéry -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation: https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple