python - bs4.FeatureNotFound: Couldn't find a tree builder with the features you requested: lxml. Do you need to install a parser library? -



python - bs4.FeatureNotFound: Couldn't find a tree builder with the features you requested: lxml. Do you need to install a parser library? -

... soup = beautifulsoup(html, "lxml") file "/library/python/2.7/site-packages/bs4/__init__.py", line 152, in __init__ % ",".join(features)) bs4.featurenotfound: couldn't find tree builder features requested: lxml. need install parser library?

the above outputs on terminal. on mac os 10.7.x. have python 2.7.1, , followed this tutorial beautiful soup , lxml, both installed , work separate test file located here. in python script causes error, have included line: from pagecrawler import comparepages , in pagecrawler file have included next 2 lines: from bs4 import beautifulsoup from urllib2 import urlopen

any help in figuring out problem , how can solved much appreciated.

i have suspicion related the parser bs utilize read html. document here if you're me (on osx) might stuck requires bit of work:

you'll notice in bs4 documentation page above, point out default bs4 utilize python built-in html parser. assuming in osx, apple-bundled version of python 2.7.2 not lenient character formatting. nail same problem, upgraded version of python work around it. doing in virtualenv minimize disruption other projects.

if doing sounds pain, can switch on lxml parser:

pip install lxml

and try:

soup = beautifulsoup(html, "lxml")

depending on scenario, might enough. found annoying plenty warrant upgrading version of python. using virtualenv, you can migrate packages easily

python python-2.7 beautifulsoup lxml

Comments

Post a Comment

Popular posts from this blog

model view controller - MVC Rails Planning -

model view controller - MVC Rails Planning - i'm starting rails , i'm building app stores films info, user can watch film , give grade on web application. i have coded cinema model, controller , views. now, have 2 questions: should need create model , controller grading? in case, should create or should wait , create first users model , controller? yes, on model , controller grades. that'd feasible way maintain track of who's graded what. it's create first, i'd start users, since grades depend on both films , users. ruby-on-rails model-view-controller
Read more

ruby on rails - Devise Logout Error in RoR -

ruby on rails - Devise Logout Error in RoR - while using devise in ror, encountering unusual error when trying log out url different root url. displays me : actioncontroller::invalidauthenticitytoken in devise::sessionscontroller#destroy" for illustration if rooting path after log in '/structure', , seek log out '/general' error, while logging out '/structure' fine. any help highly appreciated. ruby-on-rails ruby devise
Read more

html - Submenu setup with jquery and effect 'fold' -

html - Submenu setup with jquery and effect 'fold' - i want open submenu jquery effect fold, problem if user "hover effect" fast menu remain open, how can avoid this, jquery code is: $('ul.mainmenu li').hover( function() { $(this).children('ul').show('fold', 570); }, function() { $(this).children('ul').hide('fold', 500); } ); my jsfiddle link is: http://jsfiddle.net/9wkbf/ updated fiddle the reason behind problem is, first event $(this).children('ul').show('fold', 570); queued , until completes, sec animation not start. the next snippet can workaround $('ul.mainmenu > li').hover( function() { $(this).children('ul').show('fold', 570); }, function() { $('ul:not(.mainmenu)').hide('fold', 500); } ); *important note : work current scenario. jquery html css
Read more