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Full Discussion: Python Regex List Creation
Top Forums Programming Python Regex List Creation Post 302950884 by metallica1973 on Wednesday 29th of July 2015 05:01:08 PM
Old 07-29-2015
Python Regex List Creation
Here is a snippet of my code:
Code:
    blahblahblah...
    blah[]
    for link in goodies.soup.find_all('a'):
       blah.append(link.get('href'))
       blah=list(set(blah))

which gives my list of urls. So now I use a regex to search for the relevant urls which I want in a list:
Code:
     for r in blah:
     capture=re.findall(r'https://.*', r)
     print (capture)

which prints the results as:
Code:
    []
    ['https://blah.org/plugins/blahblahblahblah/']
    []
    []
    ['https://blah.org/plugins/blahblahblah/']

What I am trying to do is create a list from these results. When I attempt to do this, I always run into a brickwall:
Code:
    for r in blah:
        capture=re.findall(r'https://.*', r)
        purls=[]
        purls.append(capture)
    purls
    [[]]
    for r in blah:
        capture=re.findall(r'https://.*', r)
        purls=[]
           for a in capture:
               purls.append(a)
    purls
    []

This is the closest thing I could come up with:
Code:
    for r in blah:
         capture=re.findall(r'https://.*', r)
         rolos=capture[:]
         print rolos
    []
    ['https://blah.org/plugins/blahblahblahblah/']
    []
    []
    ['https://blah.org/plugins/blahblahblah/']
    whos
    rolos           list      n=0

But as you can see, it didnt create the list???? What am I doing wrong and how can this be accomplished ?

---------- Post updated at 05:01 PM ---------- Previous update was at 04:34 PM ----------

so it turned out to be the +=, which is the increment operator
Code:
    for r in blah:
      capture=re.findall(r'https://.*', r)
      rolos+=capture[:]

Thanks to dslackw for providing this insane resolution. I still cant believe it.
 

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LEARN ABOUT DEBIAN

dh_python

DH_PYTHON(1)							     Debhelper							      DH_PYTHON(1)

NAME

       dh_python - calculates Python dependencies and adds postinst and prerm Python scripts (deprecated)

SYNOPSIS

       dh_python [debhelperoptions] [-n] [-V version] [moduledirs...]

DESCRIPTION

       Note: This program is deprecated. You should use dh_python2 instead.  This program will do nothing if debian/pycompat or a Python-Version
       control file field exists.

       dh_python is a debhelper program that is responsible for generating the ${python:Depends} substitutions and adding them to substvars files.
       It will also add a postinst and a prerm script if required.

       The program will look at Python scripts and modules in your package, and will use this information to generate a dependency on python, with
       the current major version, or on pythonX.Y if your scripts or modules need a specific python version. The dependency will be substituted
       into your package's control file wherever you place the token ${python:Depends}.

       If some modules need to be byte-compiled at install time, appropriate postinst and prerm scripts will be generated. If already byte-
       compiled modules are found, they are removed.

       If you use this program, your package should build-depend on python.

OPTIONS

       module dirs
	   If your package installs Python modules in non-standard directories, you can make dh_python check those directories by passing their
	   names on the command line. By default, it will check /usr/lib/site-python, /usr/lib/$PACKAGE, /usr/share/$PACKAGE,
	   /usr/lib/games/$PACKAGE, /usr/share/games/$PACKAGE and /usr/lib/python?.?/site-packages.

	   Note: only /usr/lib/site-python, /usr/lib/python?.?/site-packages and the extra names on the command line are searched for binary (.so)
	   modules.

       -V version
	   If the .py files your package ships are meant to be used by a specific pythonX.Y version, you can use this option to specify the
	   desired version, such as 2.3. Do not use if you ship modules in /usr/lib/site-python.

       -n, --noscripts
	   Do not modify postinst/prerm scripts.

CONFORMS TO

       Debian policy, version 3.5.7

       Python policy, version 0.3.7

SEE ALSO

       debhelper(7)

       This program is a part of debhelper.

AUTHOR

       Josselin Mouette <joss@debian.org>

       most ideas stolen from Brendan O'Dea <bod@debian.org>

9.20120909							    2011-12-06							      DH_PYTHON(1)
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