python - Problems with navigablestrings and unicode in BeautifulSoup -

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i having problems navigablestrings , unicode in beautifulsoup (python).

basically, parsing 4 results pages youtube, , putting top result's extension (end of url after youtube.com/watch?=) list.

i loop list in 2 other functions, on one, throws error: typeerror: 'navigablestring' object not callable. however, other 1 says typeerror: 'unicode' object not callable. both using same exact string.

what doing wrong here? know parsing code not perfect, i'm using both beautifulsoup , regex. in past whenever navigablestring errors, have thrown in ".encode('ascii', 'ignore') or str(), , has seemed work. appreciated!

    url in urls:         response = urllib2.urlopen(url)         html = response.read()         soup = beautifulsoup(html)         link_data = soup.findall("a", {"class":"yt-uix-tile-link result-item-translation-title"})[0]         ext = re.findall('href="/(.*)">', str(link_data))[0]         if isinstance(ext, str):             exts.append('http://www.youtube.com/'+ext.replace(' ',''))

and then:

    ext in exts:         description = description(ext)         embed = embed(ext)

i added isinstance() lines try , see problem was. when 'str' changed 'unicode', exts list empty (meaning strings, not unicode (or navigablestrings?)). i'm quite confused...

description = description(ext) replaces function string after first iteration in loop. same embed.


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