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Full Discussion: Python re.findall inverse Match
Top Forums Programming Python re.findall inverse Match Post 302965626 by durden_tyler on Monday 1st of February 2016 10:34:35 AM
Old 02-01-2016
Quote:
Originally Posted by metallica1973
...I am used to using "!" or boolean "not" but have never done it using Pythons "re" module. ...
Yes, Python uses the more verbose "not" instead of "!" for negative regex matches.

Code:
$
$ cat pkg_list.txt
'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)',
'zzuf (0.13.svn20100215-4.1+b1 [s390x], 0.13.svn20100215-4.1 [amd64, arm64, armel, armhf, i386, mips, mipsel, powerpc, ppc64el])']
'ztex-bmp (20120314-2)',
$
$ cat -n negative_match.py
     1  #!/usr/bin/python
     2  import re
     3  input_file = "pkg_list.txt"
     4  for line in open(input_file):
     5      if not re.match('.*\[s390x\].*', line):
     6          print line,
     7
$
$ python negative_match.py
'zsync (0.6.2-1)',
'ztex-bmp (20120314-2)',
$
$

For reference, here's the corresponding regex in Perl:

Code:
$
$ perl -lne 'print if !/\[s390x\]/' pkg_list.txt
'zsync (0.6.2-1)',
'ztex-bmp (20120314-2)',
$
$ perl -lne 'print if not /\[s390x\]/' pkg_list.txt
'zsync (0.6.2-1)',
'ztex-bmp (20120314-2)',
$
$

This User Gave Thanks to durden_tyler For This Post:
Azrael
 

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LEARN ABOUT X11R4

grub-mkimage

GRUB-MKIMAGE(1) 						   User Commands						   GRUB-MKIMAGE(1)

NAME

       grub-mkimage - make a bootable image of GRUB

SYNOPSIS

       grub-mkimage [OPTION...] [OPTION]... [MODULES]

DESCRIPTION

       Make a bootable image of GRUB.

       -c, --config=FILE
	      embed FILE as an early config

       -C, --compression=(xz|none|auto)
	      choose the compression to use for core image

       -d, --directory=DIR
	      use images and modules under DIR [default=/usr/lib/grub/<platform>]

       -k, --pubkey=FILE
	      embed FILE as public key for signature checking

       -m,				--memdisk=FILE
	      embed FILE as a memdisk image

       Implies `-p (memdisk)/boot/grub' and overrides

       any prefix supplied previously, but the prefix
	      itself can be overridden by later options

       -n, --note
	      add NOTE segment for CHRP IEEE1275

       -o, --output=FILE
	      output a generated image to FILE [default=stdout]

       -O, --format=FORMAT
	      generate	an  image  in  FORMAT  available formats: i386-coreboot, i386-multiboot, i386-pc, i386-pc-pxe, i386-pc-eltorito, i386-efi,
	      i386-ieee1275, i386-qemu, x86_64-efi, i386-xen, x86_64-xen, mipsel-yeeloong-flash, mipsel-fuloong2f-flash, mipsel-loongson-elf, pow-
	      erpc-ieee1275,	sparc64-ieee1275-raw,	 sparc64-ieee1275-cdcore,    sparc64-ieee1275-aout,    ia64-efi,   mips-arc,   mipsel-arc,
	      mipsel-qemu_mips-elf, mips-qemu_mips-flash, mipsel-qemu_mips-flash, mips-qemu_mips-elf, arm-uboot, arm-efi, arm64-efi

       -p, --prefix=DIR
	      set prefix directory

       -v, --verbose
	      print verbose messages.

       -?, --help
	      give this help list

       --usage
	      give a short usage message

       -V, --version
	      print program version

       Mandatory or optional arguments to long options are also mandatory or optional for any corresponding short options.

REPORTING BUGS

       Report bugs to <bug-grub@gnu.org>.

SEE ALSO

       grub-install(8), grub-mkrescue(1), grub-mknetdir(8)

       The full documentation for grub-mkimage is maintained as a Texinfo manual.  If the info and grub-mkimage programs are properly installed at
       your site, the command

	      info grub-mkimage

       should give you access to the complete manual.

grub-mkimage (GRUB) 2.02-2ubuntu8.3				     July 2018							   GRUB-MKIMAGE(1)
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