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Full Discussion: Python re.findall inverse Match
Top Forums Programming Python re.findall inverse Match Post 302965330 by metallica1973 on Wednesday 27th of January 2016 11:49:19 AM
Old 01-27-2016
Python re.findall inverse Match
I ask of you but yet another simplistic question that I hope can be answered. Its better explained showing my code. Here is my list(tmp_pkglist), which contains a list of all Debian (Jessie) packages:
snippet
Code:
 'zssh (1.5c.debian.1-3.2+b1 [s390x], 1.5c.debian.1-3.2 [amd64, arm64, armel, armhf, i386, mips, mipsel, powerpc, ppc64el])',
 'zsync (0.6.2-1)',
 'ztex-bmp (20120314-2)',
 'zurl (1.3.1-4)',
 'zutils (1.3-4)',
 'zutils-dbg (1.3-4) utilities for dealing with compressed files transparently (debug)',
 'zvbi (0.2.35-3) Vertical Blanking Interval (VBI)',
 'zygrib (6.2.3-1)',
 'zygrib-maps (6.2.3-1)',
 'zynadd (1+git.20100609+dfsg0-2)',
 'zynaddsubfx (2.4.3-4)',
 'zynaddsubfx-dbg (2.4.3-4)',
 'zynaddsubfx-dssi (2.4.3-4)',
 'zypper (1.11.13-1)',
 'zypper-common (1.11.13-1) command line software manager using libzypp (common files)',
 'zypper-doc (1.11.13-1) command line software manager using libzypp (documentation)',
 'zziplib-bin (0.13.62-3)',
 'zzuf (0.13.svn20100215-4.1+b1 [s390x], 0.13.svn20100215-4.1 [amd64, arm64, armel, armhf, i386, mips, mipsel, powerpc, ppc64el])']

Using this block of code and using re.findall, how can I tell the regex to "not" or inversely find all of the lines that do not contain:
Code:
 'zssh (1.5c.debian.1-3.2+b1 [s390x], 1.5c.debian.1-3.2 [amd64, arm64, armel, armhf, i386, mips, mipsel, powerpc, ppc64el])
'zzuf (0.13.svn20100215-4.1+b1 [s390x], 0.13.svn20100215-4.1 [amd64, arm64, armel, armhf, i386, mips, mipsel, powerpc, ppc64el])']

I tried various combos but cannot get the inverse of what I want which is:
Code:
 'zypper (1.11.13-1)',
 'zypper-common (1.11.13-1) command line software manager using libzypp (common files)',
 'zypper-doc (1.11.13-1) command line software manager using libzypp (documentation)',
 'zziplib-bin (0.13.62-3)',

For example:
Code:
for scrape in tmp_pkglist:
            capture = re.findall('?!(.*\[s390x\].*))', scrape)
            if capture:
                    print capture

I am used to using "!" or boolean "not" but have never done it using Pythons "re" module. Thanks in advance.

---------- Post updated at 11:49 AM ---------- Previous update was at 10:44 AM ----------

This did the trick:
Code:
for scrub_norm in tmp_pkglist:
    sanitize_norm = re.findall('.*\[s390x\].*', scrub_norm)
    if not sanitize_norm:
        print scrub_norm

Thanks to grail from antother forum
 

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LEARN ABOUT LINUX

dpkg-reconfigure

DPKG-RECONFIGURE(8)						      Debconf						       DPKG-RECONFIGURE(8)

NAME

       dpkg-reconfigure - reconfigure an already installed package

SYNOPSIS

	dpkg-reconfigure [options] packages

DESCRIPTION

       dpkg-reconfigure reconfigures packages after they have already been installed. Pass it the names of a package or packages to reconfigure.
       It will ask configuration questions, much like when the package was first installed.

       If you just want to see the current configuration of a package, see debconf-show(1) instead.

OPTIONS

       -ftype, --frontend=type
	   Select the frontend to use. The default frontend can be permanently changed by:

	    dpkg-reconfigure debconf

	   Note that if you normally have debconf set to use the noninteractive frontend, dpkg-reconfigure will use the dialog frontend instead,
	   so you actually get to reconfigure the package.

       -pvalue, --priority=value
	   Specify the minimum priority of question that will be displayed.  dpkg-reconfigure normally shows low priority questions no matter what
	   your default priority is. See debconf(7) for a list.

       --default-priority
	   Use whatever the default priority of question is, instead of forcing the priority to low.

       -a, --all
	   Reconfigure all installed packages that use debconf. Warning: this may take a long time.

       -u, --unseen-only
	   By default, all questions are shown, even if they have already been answered. If this parameter is set though, only questions that have
	   not yet been seen will be asked.

       --force
	   Force dpkg-reconfigure to reconfigure a package even if the package is in an inconsistent or broken state. Use with caution.

       --no-reload
	   Prevent dpkg-reconfigure from reloading templates. Use with caution; this will prevent dpkg-reconfigure from repairing broken templates
	   databases.  However, it may be useful in constrained environments where rewriting the templates database is expensive.

       -h, --help
	   Display usage help.

SEE ALSO

       debconf(7)

AUTHOR

       Joey Hess <joeyh@debian.org>

								    2011-06-22						       DPKG-RECONFIGURE(8)
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