8000 Skip minor version on apt build dep by romuald · Pull Request #647 · python/devguide · GitHub
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Skip minor version on apt build dep #647

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romuald
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@romuald romuald commented Dec 10, 2020

The current Debian (buster) seems to allow users to use apt-get build-dep python3 to install the build dependencies (the 3.6 version is also out of date)

@romuald
Skip minor version on apt build dep
7c6f81e 
The current Debian (buster) seems to allow users to use
`apt-get build-dep python3` to install the build dependencies
(the 3.6 version is also out of date)
@CAM-Gerlach
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When I try this on my Raspbian 10 (Buster) system, I get very different results when running sudo apt build-dep python3 vs python3.7, the latest version availble. It seems to assume I mean the python3-defaults package, which comes with a much smaller (sub)set of build dependencies than the actual latest Python version.

Command output on a fairly clean RPi 4 with Raspbian 10 (Buster) installed:

pi@mjolnir2:~ $ sudo apt build-dep python3
Reading package lists... Done
Picking 'python3-defaults' as source package instead of 'python3'
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following NEW packages will be installed:
  autoconf automake autopoint autotools-dev debhelper dh-autoreconf dh-strip-nondeterminism docbook-xml docbook-xsl dwz gettext
  intltool-debian libarchive-zip-perl libdebhelper-perl libfile-stripnondeterminism-perl libgc1c2 libsigsegv2 libtool m4 po-debconf
  sgml-data w3m xsltproc
0 upgraded, 23 newly installed, 0 to remove and 250 not upgraded.
Need to get 8,101 kB of archives.
After this operation, 37.0 MB of additional disk space will be used.
Do you want to continue? [Y/n] n
Abort.
pi@mjolnir2:~ $ sudo apt build-dep python3.7
Reading package lists... Done
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following NEW packages will be installed:
  autoconf automake autopoint autotools-dev blt-dev debhelper dh-autoreconf dh-strip-nondeterminism diffstat dwz gettext
  intltool-debian libarchive-zip-perl libbluetooth-dev libbz2-dev libdb-dev libdb5.3-dev libdebhelper-perl libffi-dev
  libfile-stripnondeterminism-perl libfontconfig1-dev libgdbm-dev libice-dev liblzma-dev libmpdec-dev libncurses-dev
  libncursesw5-dev libpthread-stubs0-dev libreadline-dev libsigsegv2 libsm-dev libsqlite3-dev libssl-dev libtext-unidecode-perl
  libtool libx11-dev libxau-dev libxcb1-dev libxdmcp-dev libxext-dev libxft-dev libxml-libxml-perl libxml-namespacesupport-perl
  libxml-sax-base-perl libxml-sax-perl libxrender-dev libxss-dev libxt-dev locales-all m4 po-debconf python-babel-localedata
  python3-alabaster python3-babel python3-imagesize python3-packaging python3-pyparsing python3-sphinx python3-tz quilt sharutils
  sphinx-common tcl tcl-dev tcl8.6 tcl8.6-dev tex-common texinfo time tk tk-dev tk8.6 tk8.6-dev uuid-dev x11proto-core-dev
  x11proto-dev x11proto-scrnsaver-dev x11proto-xext-dev xorg-sgml-doctools xtrans-dev xvfb
The following packages will be upgraded:
  libbluetooth3 libsqlite3-0 libssl1.1 libx11-6 xserver-common
5 upgraded, 81 newly installed, 0 to remove and 245 not upgraded.
Need to get 41.6 MB of archives.
After this operation, 324 MB of additional disk space will be used.
Do you want to continue? [Y/n] n
Abort.
pi@mjolnir2:~ $

Also, FWIW, the commands should presumably be updated to be sudo apt <...>; apt is the modern, higher-level way for humans to invoke the APT package manager and should be preferred to the lower-level backend apt-get for interactive use, as it supports the same basic commands/API but with much nicer output and other helpful features, while the latter is intended for scripts and programmatic output parsing. See here for more details. I can submit a PR on that.

@ezio-melotti
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This has been fixed in #673, and the minor version has been removed, so I'm going to close this.

@CAM-Gerlach, if you think this should be reverted or perhaps a note be added about Raspbian, you can open a new issue/PR. Same goes for replacing apt-get with apt (currently the docs still use apt-get).

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@romuald @CAM-Gerlach @ezio-melotti @the-knights-who-say-ni
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