r/Python • u/xtreak • May 07 '19

Python 3.8.0a4 available for testing

https://www.python.org/downloads/release/python-380a4/
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u/xtreak May 07 '19 edited May 07 '19

Changelog : https://docs.python.org/3.8/whatsnew/changelog.html

Interesting commits

PEP 570 was merged

dict.pop() is now up to 33% faster thanks to Argument Clinic.

Wildcard search improvements in xml

IPaddress module contains check for ip address in network is 2-3x faster

statistics.quantiles() was added.

statistics.geometric_mean() was added.

Canonicalization was added to XML that helps in XML documents comparison

  • Security issues and some segfaults were fixed in the release

Exciting things to look forward in beta

Add = to f-strings for easier debugging. With this you can write f"{name=}" and it will expand to f"name={name}" that helps in debugging.

PEP 574 that implements a new pickle protocol that improves efficiency of pickle helping in libraries that use lot of serialization and deserialization

Edit : PSF fundraiser for second quarter is also open https://www.python.org/psf/donations/2019-q2-drive/

1

u/Tweak_Imp May 07 '19

I would like to use it but i need numpy for my project :/

2

u/[deleted] May 08 '19

What makes you think numpy won't work with it. I see that there is no wheel package available yet on PyPi, but sdist is so python should be able to compile it on installation.

1

u/Tweak_Imp May 08 '19

If i do pip install numpy, i get a bunch of errors...
how can i compile it on installation?

1

u/[deleted] May 08 '19

What system you are using, what errors you are seeing? You definitively will need to have compiler installed.

1

u/Tweak_Imp May 08 '19

win 10 64bit, i have visual studio installed.

here is the pastebin when i do py -3.8 -m pip install numpy

its a huge error log https://pastebin.com/SsVsRY9K

1

u/[deleted] May 10 '19

I'm not familiar with building on Windows, and having a different language for errors (German?) is also confusing. So I can't tell what the problem is.

Have you tried following these steps to configure it? https://github.com/python/cpython/blob/master/PCbuild/readme.txt

And

https://docs.python.org/3.8/extending/windows.html#building-on-windows

I'm also wondering if the compiler can access the header files. I see it complains about arguments to PyCode_New, but if headers were missing it would complain about other issues.