append lists recursively in python

Question

I have a loop. Everytime the loop runs, a new list is created. I want to add the all these lists together. My code is as follows:

while i < len(symbolslist):

    html_text = urllib.urlopen('my-url.com/'+symbolslist[i]).read()
    pattern = re.compile('<a target="_blank" href="(.+?)" rel="nofollow"')
    applink = re.findall(pattern, htmltext)
    applink += applink
    i+=1

where applink is a list. However, with the current code I have, it only adds the last two lists together. What am I doing wrong?

Thanks!

applink = re.findall(pattern,htmltext) <...> applink += applink — aaaaa says reinstate Monica
– aaaaa says reinstate Monica, Commented Jun 30, 2015 at 4:18

Anand S Kumar · Accepted Answer · 2015-06-30 04:27:21Z

2

The issue is that you are using applink as the variable name to store the list returned by re.findall() , hence you are ending up creating a new list everytime, instead of that use a different name and then extend applink to include the new list (or use +=).

Code -

applink = []
while i<len(symbolslist):

    url = "http://www.indeed.com/resumes/-/in-Singapore?co=SG&start="+str(symbolslist[i])
    htmlfile = urllib.urlopen(url)
    htmltext = htmlfile.read()
    regex = '<a target="_blank" href="(.+?)" rel="nofollow"'
    pattern = re.compile(regex)
    tempapplink = re.findall(pattern,htmltext)
    print tempapplink
    applink += tempapplink
    i+=1

edited Jun 30, 2015 at 4:27

answered Jun 30, 2015 at 4:13

Anand S Kumar

91.4k18 gold badges196 silver badges179 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

append lists recursively in python

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related