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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

explain_select_or_die

explain_select_or_die(3)				     Library Functions Manual					  explain_select_or_die(3)

NAME

       explain_select_or_die - blah blah and report errors

SYNOPSIS

       #include <libexplain/select.h>
       void explain_select_or_die(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout);

DESCRIPTION

       The  explain_select_or_die  function  is  used  to  call  the  select(2) system call.  On failure an explanation will be printed to stderr,
       obtained from explain_select(3), and then the process terminates by calling exit(EXIT_FAILURE).

       This function is intended to be used in a fashion similar to the following example:
	      explain_select_or_die(nfds, readfds, writefds, exceptfds, timeout);

       nfds    The nfds, exactly as to be passed to the select(2) system call.

       readfds The readfds, exactly as to be passed to the select(2) system call.

       writefds
	       The writefds, exactly as to be passed to the select(2) system call.

       exceptfds
	       The exceptfds, exactly as to be passed to the select(2) system call.

       timeout The timeout, exactly as to be passed to the select(2) system call.

       Returns:
	       This function only returns on success.  On failure, prints an explanation and exits.

SEE ALSO

       select(2)
	       blah blah

       explain_select(3)
	       explain select(2) errors

       exit(2) terminate the calling process

COPYRIGHT

       libexplain version 0.52
       Copyright (C) 2008 Peter Miller

															  explain_select_or_die(3)
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