Bug#195805: python-apt: silently looses some dependencies

[Jochen Voss <voss@debian.org>]

Package: python-apt
Version: 0.5.5
Severity: normal

Hallo,

recently I found out that the python-apt package sometimes
does not give all dependencies of a package.

Example: when I run the script

    #!/usr/bin/python

    import apt_pkg

    apt_pkg.init()
    cache = apt_pkg.GetCache()

    package=cache["flac"]
    print package

    current=package.VersionList[0]
    print current

    dl=current.DependsList
    print dl

    depends=current.DependsList["Depends"]
    print depends

I get the following output:

    Reading Package Lists... Done
    Building Dependency Tree... Done
    <pkgCache::Package object: Name:'flac' Section: 'sound' ID:35 Flags:0x0>
    <pkgCache::Version object: Pkg:'flac' Ver:'1.1.0-3' Section:'sound' Arch:'i386' Size:477840 ISize:4186112 Hash:32099 ID:450 Priority:4>
    {'Depends': [[<pkgCache::Dependency object: Pkg:'libc6' Ver:'2.3.1-1' Comp:'>='>], [<pkgCache::Dependency object: Pkg:'libogg0' Ver:'1.0.0' Comp:'>='>]]}
    [[<pkgCache::Dependency object: Pkg:'libc6' Ver:'2.3.1-1' Comp:'>='>], [<pkgCache::Dependency object: Pkg:'libogg0' Ver:'1.0.0' Comp:'>='>]]

This looks fine at the first glance.  But then compare this
to the output of apt-cache:

    automatix:/eimer# apt-cache show flac
    Package: flac
    Priority: optional
    Section: sound
    Installed-Size: 4088
    Maintainer: Matt Zimmerman <mdz@debian.org>
    Architecture: i386
    Version: 1.1.0-3
    Depends: libc6 (>= 2.3.1-1), libflac4, libogg0 (>= 1.0.0), liboggflac1
    Filename: pool/main/f/flac/flac_1.1.0-3_i386.deb
    Size: 477840
    MD5sum: ea7b41b99b40fe0a722f44432ec9dc49
    Description: Free Lossless Audio Codec - command line tools
     [...]

The "libflac4" and "liboggflac1" dependencies are missing from
the output of the Python program.

I hope this helps,
Jochen
-- System Information:
Debian Release: testing/unstable
Architecture: i386
Kernel: Linux automatix.mathematik.uni-kl.de 2.4.20 #1 Mon Mar 31 11:20:37 CEST 2003 i686
Locale: LANG=de_DE@euro, LC_CTYPE=de_DE@euro

Versions of packages python-apt depends on:
ii  apt [libapt-pkg-libc6.3-5-3.3 0.5.5.1    Advanced front-end for dpkg
ii  apt-utils [libapt-inst-libc6. 0.5.5.1    APT utility programs
ii  libc6                         2.3.1-17   GNU C Library: Shared libraries an
ii  python                        2.2.3-1    An interactive high-level object-o

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