i have been struggling with an issue for days.
My situation is this: i want to get into hadoop and realtime analytics. As ax example, i want to scrape some prices from a particular website. The script works on my laptop but when i move it to NIFI it starts giving issue. I have a Raspbarian Desktop virtual environment setup on my laptop. I am using NIFI to get data from an ExecuteScript. I have this code which works on my native laptop:
import requests
from bs4 import BeautifulSoup
from html import HTML
page = requests.get('https://web.archive.org/web/20121007172955/https://www.nga.gov/collection/anZ1.htm')
# Create a BeautifulSoup object
soup = BeautifulSoup(page.text, 'html.parser')
As soon as i put it into NIFI, it start complaining about "no module named HTML in line 2. I know this is a module issue but i just don't have the necessary experience to identify the root cause and fix the issue.
Things to note:
I switched form python 2.7 to python 3.5 by using the alternative method.
in the Execute Script component, i set the module directory to the following:
/usr/local/lib/python3.5/dist-packages,/usr/lib/python3/dist-packages
Is there anyone which is familiar with this environment to assist me with the missing modules and how to fix this ?
I have installed Python 3.6 and have tried to install Beautiful Soup 4. After several issues the bs4 installation worked but every time I try and reference the bs4 installation with from bs4 import beautifulsoup, I get the following error:
ImportError: cannot import name 'beautifulsoup'
I have set the PATH variable to point to the python36-32 folder and the bs4 folder has been created in python36-32\lib\site-packages.
Any assistance would be much appreciated!
The correct way to import is from bs4 import BeautifulSoup.
If you look at the examples in the documentation you can see how to use it.
I'm new to python and I tried to parse some XML files in order to add some new tags and store that new XML file.
python-beautifulsoup seams to be the right package for that. Searching around the web for tutorials, how to add an new tag to XML parsed by BeautifulSoup, i found out, that the package python-bs4 is used.
Looking at the package description, both packages have the same title:
python-bs4 - error-tolerant HTML parser for Python
python-beautifulsoup - error-tolerant HTML parser for Python
So my question: what is the difference?
When I go to the beautifulsoup 4.0 documentation, the first page has this information:
(The BeautifulSoup package is probably not what you want. That’s the previous major release, Beautiful Soup 3. Lots of software uses BS3, so it’s still available, but if you’re writing new code you should install beautifulsoup4.)
For those, like me, reading this years later, please note. The above is referring to installing with a system package manager, like apt-get, from which you can install python-bs4 or python3-bs4.
If installing with pip, use pip install beautifulsoup4, currently at V4.7.1.
Since March 2016 there is bs4 package on PyPI
The description is
This is a dummy package managed by the developer of Beautiful Soup to
prevent name squatting. The official name of PyPI’s Beautiful Soup
Python package is beautifulsoup4. This package ensures that if you
type pip install bs4 by mistake you will end up with Beautiful Soup.
...
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 a tree builder with the features you requested: lxml. Do you need to install a parser library?
The above outputs on my Terminal. I am on Mac OS 10.7.x. I have Python 2.7.1, and followed this tutorial to get Beautiful Soup and lxml, which both installed successfully and work with a separate test file located here. In the Python script that causes this error, I have included this line:
from pageCrawler import comparePages
And in the pageCrawler file I have included the following two lines:
from bs4 import BeautifulSoup
from urllib2 import urlopen
Any help in figuring out what the problem is and how it can be solved would much be appreciated.
I have a suspicion that this is related to the parser that BS will use to read the HTML. They document is here, but if you're like me (on OSX) you might be stuck with something that requires a bit of work:
You'll notice that in the BS4 documentation page above, they point out that by default BS4 will use the Python built-in HTML parser. Assuming you are in OSX, the Apple-bundled version of Python is 2.7.2 which is not lenient for character formatting. I hit this same problem, so I upgraded my version of Python to work around it. Doing this in a virtualenv will minimize disruption to other projects.
If doing that sounds like a pain, you can switch over to the LXML parser:
pip install lxml
And then try:
soup = BeautifulSoup(html, "lxml")
Depending on your scenario, that might be good enough. I found this annoying enough to warrant upgrading my version of Python. Using virtualenv, you can migrate your packages fairly easily.
I'd prefer the built in python html parser, no install no dependencies
soup = BeautifulSoup(s, "html.parser")
For basic out of the box python with bs4 installed then you can process your xml with
soup = BeautifulSoup(html, "html5lib")
If however you want to use formatter='xml' then you need to
pip3 install lxml
soup = BeautifulSoup(html, features="xml")
Run these three commands to make sure that you have all the relevant packages installed:
pip install bs4
pip install html5lib
pip install lxml
Then restart your Python IDE, if needed.
That should take care of anything related to this issue.
Actually 3 of the options mentioned by other work.
# 1.
soup_object= BeautifulSoup(markup,"html.parser") #Python HTML parser
# 2.
pip install lxml
soup_object= BeautifulSoup(markup,'lxml') # C dependent parser
# 3.
pip install html5lib
soup_object= BeautifulSoup(markup,'html5lib') # C dependent parser
I am using Python 3.6 and I had the same original error in this post. After I ran the command:
python3 -m pip install lxml
it resolved my problem
Install LXML parser in python environment.
pip install lxml
Your problem will be resolve. You can also use built-in python package for the same as:
soup = BeautifulSoup(s, "html.parser")
Note: The "HTMLParser" module has been renamed to "html.parser" in Python3
Instead of using lxml use html.parser, you can use this piece of code:
soup = BeautifulSoup(html, 'html.parser')
Although BeautifulSoup supports the HTML parser by default
If you want to use any other third-party Python parsers you need to install that external parser like(lxml).
soup_object= BeautifulSoup(markup, "html.parser") #Python HTML parser
But if you don't specified any parser as parameter you will get an warning that no parser specified.
soup_object= BeautifulSoup(markup) #Warnning
To use any other external parser you need to install it and then need to specify it. like
pip install lxml
soup_object= BeautifulSoup(markup, 'lxml') # C dependent parser
External parser have c and python dependency which may have some advantage and disadvantage.
In my case I had an outdated version of the lxml package. So I just updated it and this fixed the issue.
sudo python3 -m pip install lxml --upgrade
I encountered the same issue. I found the reason is that I had a slightly-outdated python six package.
>>> import html5lib
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/local/lib/python2.7/site-packages/html5lib/__init__.py", line 16, in <module>
from .html5parser import HTMLParser, parse, parseFragment
File "/usr/local/lib/python2.7/site-packages/html5lib/html5parser.py", line 2, in <module>
from six import with_metaclass, viewkeys, PY3
ImportError: cannot import name viewkeys
Upgrading your six package will solve the issue:
sudo pip install six=1.10.0
In some references, use the second instead of the first:
soup_object= BeautifulSoup(markup,'html-parser')
soup_object= BeautifulSoup(markup,'html.parser')
The error is coming because of the parser you are using. In general, if you have HTML file/code then you need to use html5lib(documentation can be found here) & in-case you have XML file/data then you need to use lxml(documentation can be found here). You can use lxml for HTML file/code also but sometimes it gives an error as above. So, better to choose the package wisely based on the type of data/file. You can also use html_parser which is built-in module. But, this also sometimes do not work.
For more details regarding when to use which package you can see the details here
Blank parameter will result in a warning for best available.
soup = BeautifulSoup(html)
---------------/UserWarning: No parser was explicitly specified, so I'm using the best available HTML parser for this system ("html5lib"). This usually isn't a problem, but if you run this code on another system, or in a different virtual environment, it may use a different parser and behave differently.----------------------/
python --version Python 3.7.7
PyCharm 19.3.4 CE
My solution was to remove lxml from conda and reinstalling it with pip.
I am using python 3.8 in pycharm. I assume that you had not installed "lxml" before you started working. This is what I did:
Go to File -> Settings
Select " Python Interpreter " on the left menu bar of settings, select "Python Interpreter."
Click the "+" icon over the list of packages.
Search for "lxml."
Click "Install Package" on the bottom left of the "Available Package" window.
pip install lxml then keeping xml in soup = BeautifulSoup(URL, "xml") did the job on Mac.
This method worked for me. I prefer to mention that I was trying this in the virtual environment. First:
pip install --upgrade bs4
Secondly, I used:
html.parser
instead of
html5lib
I fixed with below changes
Before changes
soup = BeautifulSoup(r.content, 'html5lib' )
print (soup.prettify())
After change
soup = BeautifulSoup(r.content, features='html')
print(soup.prettify())
my code works properly
BS4 by default expects an HTML document. Therefore, it parses an XML document as an HTML one. Pass features="xml" as an argument in the constructor. It resolved my issue.
You may want to double check that you're using the right interpreter if you have multiple versions of Python installed.
Once I chose the correct version of Python, lxml was found.
I need to use urllib2 with BeautifulSoup. I found the download file for BeautifulSoup and installed it, however, I couldn't find any download files for urllib2, is there another way to intall that module?
The module comes with Python, simply import it:
import urllib2
If you're using Python3, the urllib was replaced by urllib.request. The Urllib PEP (Python3): http://www.python.org/dev/peps/pep-3108/#urllib-package.