Bug#890876: python-apt: Provide API for versioned provides
Package: python-apt
Version: 1.4.0~beta3
Severity: whistlist
Dear Maintainer,
I'm using python-apt to analyse inter-package-dependencies and just
stumbled over "python-cffi-backend", which already uses versioned
Provdies¹ in Debian-Stretch:
import apt
cache = apt.Cache()
pkg = cache['python-cffi-backend']
cand = pkg.candidate
print(cand.provides)
# ['python-cffi-backend-api-min', 'python-cffi-backend-api-max', 'python-cffi-backend-api-9729']
print(cand.record['Provides'])
# 'python-cffi-backend-api-9729, python-cffi-backend-api-max (= 10239), python-cffi-backend-api-min (= 9729)'
As a temporary work-around I'm now using
for (providesname, providesver, version) in cand._cand.provides_list:
print(providesname, providesver)
# ('python-cffi-backend-api-min', '9729')
# ('python-cffi-backend-api-max', '10239')
# ('python-cffi-backend-api-9729', None)
python-apt should have an "official" API to access the version
information.
¹: <https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=761219>: debian-policy: document versioned Provides
-- System Information:
Debian Release: 9.3
APT prefers stable-updates
APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 4.9.0-5-amd64 (SMP w/4 CPU cores)
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8), LANGUAGE=de:en_US (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
Versions of packages python-apt depends on:
ii dirmngr 2.1.18-8~deb9u1
ii gnupg 2.1.18-8~deb9u1
ii libapt-inst2.0 1.4.8
ii libapt-pkg5.0 1.4.8
ii libc6 2.24-11+deb9u1
ii libgcc1 1:6.3.0-18
ii libstdc++6 6.3.0-18
ii python 2.7.13-2
ii python-apt-common 1.4.0~beta3
Versions of packages python-apt recommends:
ii iso-codes 3.75-1
ii lsb-release 9.20161125
ii xz-utils 5.2.2-1.2+b1
Versions of packages python-apt suggests:
ii apt 1.4.8
pn python-apt-dbg <none>
ii python-apt-doc 1.4.0~beta3
-- no debconf information
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