Building on Windows
I have a Windows virtual machine and I'm following the instructions on the devguide [1] to build Python inside it. When running `PCbuild\build\bat -e -d` I get "Cannot locate MSBuild.exe on PATH or as MSBUILD variable". I've done a minimal amount of searching [2][3] but I'm not well-acquainted with Windows and don't understand the solutions. Thanks in advance. Kind regards, Sam Ezeh [1]: https://devguide.python.org/compiler/ [2]: https://bugs.python.org/issue41213 [3]: https://bugs.python.org/issue33675 -- https://mail.python.org/mailman/listinfo/python-list
Re: Building on Windows
To add to this, my process was 1. Setup the VM 2. Install Git 3. Clone CPython 4. Run `PCbuild\build.bat -d -e` 5. Notice the error, then install visual studio community 2022 6. Re-run `PCbuild\build.bat -d -e` and see the same error I can't directly copy and paste between the VM and my host desktop but in this scenario, the error was that single line and I can use paste sites where necessary. Kind regards, Sam Ezeh On Sat, 2 Jul 2022 at 15:27, Sam Ezeh wrote: > > I have a Windows virtual machine and I'm following the instructions on > the devguide [1] to build Python inside it. > > When running `PCbuild\build\bat -e -d` I get "Cannot locate > MSBuild.exe on PATH or as MSBUILD variable". I've done a minimal > amount of searching [2][3] but I'm not well-acquainted with Windows > and don't understand the solutions. > > Thanks in advance. > > Kind regards, > Sam Ezeh > > [1]: https://devguide.python.org/compiler/ > [2]: https://bugs.python.org/issue41213 > [3]: https://bugs.python.org/issue33675 -- https://mail.python.org/mailman/listinfo/python-list
Re: Building on Windows
> On 2 Jul 2022, at 15:41, Sam Ezeh wrote: > > To add to this, my process was > > 1. Setup the VM > 2. Install Git > 3. Clone CPython > 4. Run `PCbuild\build.bat -d -e` > 5. Notice the error, then install visual studio community 2022 Try running this: call "C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Auxiliary\Build\vcvars64.bat" I use that to get at the command line tools. If that does not work then search the disk for msbuild.exe and add its folder to your PATH. Barry > 6. Re-run `PCbuild\build.bat -d -e` and see the same error > > I can't directly copy and paste between the VM and my host desktop but > in this scenario, the error was that single line and I can use paste > sites where necessary. > > Kind regards, > Sam Ezeh > > On Sat, 2 Jul 2022 at 15:27, Sam Ezeh wrote: >> >> I have a Windows virtual machine and I'm following the instructions on >> the devguide [1] to build Python inside it. >> >> When running `PCbuild\build\bat -e -d` I get "Cannot locate >> MSBuild.exe on PATH or as MSBUILD variable". I've done a minimal >> amount of searching [2][3] but I'm not well-acquainted with Windows >> and don't understand the solutions. >> >> Thanks in advance. >> >> Kind regards, >> Sam Ezeh >> >> [1]: https://devguide.python.org/compiler/ >> [2]: https://bugs.python.org/issue41213 >> [3]: https://bugs.python.org/issue33675 > -- > https://mail.python.org/mailman/listinfo/python-list > -- https://mail.python.org/mailman/listinfo/python-list
Re: Byte arrays and DLLs
Il giorno venerdì 1 luglio 2022 alle 00:46:13 UTC+2 ery...@gmail.com ha scritto: > On 6/30/22, Rob Cliffe via Python-list wrote: > > > > AKAIK it is not possible to give ctypes a bytearray object and persuade > > it to give you a pointer to the actual array data, suitable for passing > > to a DLL. > You're overlooking the from_buffer() method. For example: > > >>> ba = bytearray(10) > >>> ca = (ctypes.c_char * len(ba)).from_buffer(ba) > >>> ca.value = b'spam&eggs' > >>> ba > bytearray(b'spam&eggs\x00') > > Note that the bytearray can't be resized while a view of the data is > exported. For example: > > >>> ba.append(97) > Traceback (most recent call last): > File "", line 1, in > BufferError: Existing exports of data: object cannot be re-sized > > >>> del ba[-1] > Traceback (most recent call last): > File "", line 1, in > BufferError: Existing exports of data: object cannot be re-sized Have you had a look at numpy (https://numpy.org/)? Typically, it is used for all scientific applications, supports several different kind of array, fast linear algebra, etc. And of course you can pass an array to a dynamic library with ctypes (https://numpy.org/doc/stable/reference/routines.ctypeslib.html). -- https://mail.python.org/mailman/listinfo/python-list
