You can even use a VM to mess with risky software or hacks without the threat of jeopardizing your laptop. Click Next and on the next screen is where you get to decide how much RAM you want to set aside for CentOS — kind of like how your primary OS requires a certain amount of memory to operate. This number is represented in megabytes MB.
Fixed size has the advantage of some slight speed increases because of its larger initial size. You can leave the default name as is or change it to anything you choose. For the virtual hard drive size we entered 40GB , then click Create. Can you feel it. I can also confirm that pausing the protection or totally quitting it and running as admin is not a fix, even if it were it wouldn't be considered a 'safe' option.
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Description I am not able to install VirtualBox nor 5. Attachments VBoxInstallLog. This site uses Akismet to reduce spam. Learn how your comment data is processed. How to install Python 2. Contents Install Python 2. Open a command terminal 2. Add Universe repo 3. Install Python2. Reason I ask: For a regular interpreter where the executable's linked against libpython2. And if I build a numpy using debian, the resulting multiarray. OTOH debian doesn't seem to be consistent -- some python-foo packages depend on libpython, and some don't.
And I don't know what they've done to distutils so that it doesn't link to -lpython2. In this case the python symbols don't make it into the global ELF namespace, so that won't be visible to extension modules. So AFAICT it really is better if python extensions link to libpython explicitly, and libpython gets included on distros out-of-the-box -- that's how fedora does it.
Are you suggesting that we do this for manylinux wheels in general? I'm very nervous about editing it out like that, especially in an automatic tool like auditwheel repair. I don't know exactly what the reason is that some packages get built with a dependency on libpython. I guess the idea would be to have another tool or a command line flag to auditwheel to do this extra processing. I think our options are either to add a useful warning and instruction in pip, or to do this hack - what do y'all think?
I bet the qt libpython dependency is an accident of the complexity of building the package. The PEP text says that it's permissible for manylinux wheels to link against libpython. So adding a check to the pip platform detection PR that ensures the library is available would be my vote.
So if we do want to stick with allowing manylinux wheels to link against libpython, then my vote would be that we add a special case to pip to detect missing libpython, and if that's the only reason it can't install a manylinux wheel then it should error out with some useful error message like "you should install libpython".
Anyway, as explained in the email the full details are actually rather complicated and subtle I guess we can see what people say. Maybe just not linking to libpython is a good solution, and it doesn't necessarily have to require auditwheel to do the fixups. I guess that pip would first have to detect whether there was a manylinux wheel available to install, before raising the error, otherwise the user will lose the ability to do installs of pure python packages from sdists.
That in turn would mean that if the author of a pure Python package made a manylinux wheel, then users would start getting an error instead of the installed package, on these systems. If you're missing libpython, and your only options are sdist or manylinux-that-depends-on-libpython, then you're doomed no matter what, so we might as well give you an error message that leads you to the simple solution install libpython so you can use the wheel.
That said, after further investigation I think I am leaning towards saying that manylinux1 wheels should not link to libpython at least for current python versions, and maybe we can fix it for 3. Presumably we don't want to raise this error for pip install six because this used to work and there is no reason why it should not in the manylinux era.
The question then is, how to know when to raise an error. We could ask pip to try and work out whether the sdist needs compilation or not is there an easy way?
Or we could ask pip to look for a manylinux wheel, and fail in that case, on the basis that this is likely to be a package that pip cannot install without the manylinux wheel. But that does have the disadvantage that if the packager of six makes a manylinux wheel, then the user will get an error, despite the fact that an install from sdist will work fine.
EDIT: of course I realized when sitting in a church pew today you can't build a 'manylinux1' wheel for six - because it's pure Python and it won't have a platform tag.
On the other hand, there are packages like tornado and pyyaml and markupsafe that will build in pure Python mode, but can also build with compiled modules, for for these it would be possible to break a previously working sdist install by adding a manylinux wheel.
Maybe pip or Debian could be persuaded to include the logic to give a better error message if pip tries and fails to compile package from an sdist - something like "Cannot compile package with extension code; you may need to install python-dev". We'd still be leaving other people that use statically-compiled Pythons either on a different distro, or compiling from source, in the lurch. Robert - you mean, if we use the pip error, then people with statically compiled Pythons will not be able to use manylinux wheels?
The fact that Debian and Ubuntu has been packaging most extensions without a libpython dependency for a long time, makes me think that we are very likely to get away with it for manylinux. Right, so are we agreeing here, that the PEP text should be changed to disallow linking to libpython? Yes, I think we're all agreeing now. But I thought you said over on distutils-sig that you didn't think that was acceptable? I checked two programs that have plugins where the plugins embed python -- libreoffice and xchat.
This is terrible and not what you should do, but it does mean that they will with correctly even with extensions that don't link against libpython.
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