Importing bs4 in Python 3.5

问题:

I have installed both Python 3.5 and Beautifulsoup4. When I try to import bs4, I get the error below. Is there any fix for that? Or should I just install Python 3.4 instead? Please be very explicit - I am new to programming. Many thanks!

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Python 3.5\lib\sit-packages\bs4\__init__.py", line 30, in    <module>
   from .builder import builder_registry, ParserRejectionMarkup
  File "C:\Python 3.5\lib\sit-packages\bs4\__init__.py", line 308, in <module>
   from . import _htmlparser
  File "C:\Python 3.5\lib\sit-packages\bs4\_htmlparser.py", line 7, in <module>
   from html.parser import ( 
ImportError: cannot import name 'HTMLParseError'

回答1:

Update: Starting with 4.4.0, BeautifulSoup is compatible with Python 3.5. Upgrade:

pip install --upgrade beautifulsoup4

---

Old answer:

Because of the changes made for Deprecate strict mode of HTMLParser issue:

Issue #15114: the strict mode and argument of HTMLParser, HTMLParser.error, and the HTMLParserError exception have been removed.

I'm afraid beautifulSoup4 is not compatible with Python 3.5 at the moment. Use Python 3.4.

回答2:

Update: BeautifulSoup 4.4.0 has been updated to be python3.5 compatible, so a pip install --upgrade beautifulsoup4 should do the trick if you are still hitting this issue.

回答3:

I've sent the author a followup about this bug. If you want to install BeautifulSoup on Python 3.5a, I've uploaded a working patch of the source code to github.

https://github.com/jjangsangy/BeautifulSoup4

You can install it using setup.py or just copy & paste this code into terminal.

git clone https://github.com/jjangsangy/BeautifulSoup4 \
    && cd BeautifulSoup4 \
    && python3.5 setup.py install

I'm assuming here that since you're trying out 3.5a your python interpreter is installed with proper user permissions for your site-packages directory so no sudo invocation is necessary.