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I have a perplexing problem. I have used mac version 10.9, anaconda 3.4.1, python 2.7.6.

Developing web application with python-amazon-product-api. i have overcome an obstacle about installing lxml, referencing clang error: unknown argument: '-mno-fused-madd' (python package installation failure).

But another runtime error happened. Here is the output from webbrowser.

Exception Type: ImportError Exception Value: dlopen(/Users/User_Name/Documents/App_Name/lib/python2.7/site-packages/lxml/etree.so, 2): Library not loaded: libxml2.2.dylib Referenced from: /Users/User_Name/Documents/App_Name/lib/python2.7/site-packages/lxml/etree.so Reason: Incompatible library version: etree.so requires version 12.0.0 or later, but libxml2.2.dylib provides version 10.0.0

I'm not sure how to proceed and have searched here and elsewhere for this particular error.

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  • I found a solution. I removed virtualenv's library setting. I reinstalled app-required libraries in local ID's python path. Not used virtualenv's setting. Inconvenient but the problem was solved. Commented Apr 20, 2014 at 12:23

6 Answers 6

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102

This worked for me:

brew install libxml2 brew install libxslt brew link libxml2 --force brew link libxslt --force
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4 Comments

Homebrew was the only way that worked for me. Tried all the other suggestions but no good.
Instead of brew link libxml2 --force, you can run echo /usr/local/opt/libxml2/lib/python2.7/site-packages >> /usr/local/lib/python2.7/site-packages/libxml2.pth.
3rd or 4th time I've needed this, months apart each time. Wish I could upvote 3-4 times haha. Thanks!
This worked for me and saved me so much time debugging. THANK YOU!
42

If using conda, force a reinstall of lxml:

$ conda install -f lxml

Note that forcing a reinstall may have unforeseen consequences.

I first tried conda update lxml to no effect.

Then tried conda install lxml also to no effect (but that was a while ago and ymmv -- see comment).

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'conda install lxml' worked for me (in my case, the '-f' option was not required)... the other answer below (conda install libxml2) did not work.
11

I was having this same issue. I realized that during pip install for my web app, lxml was attempting the following:

"Building against libxml2/libxslt in the following directory: /Users/[me]/anaconda/lib"

Not 100% sure why, but once I removed the anaconda/bin from my system path in bash_profile (anaconda sticks it in there when installing) I was able to pip install lxml correctly. After which you should be able to re-add anaconda/bin to your system path without issue.

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8

I get this to work by doing the following:

conda install libxml2
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0

Consider using an alternative channel in conda.

$ anaconda search -t conda pyquery Using anaconda-server api site https://api.anaconda.org Run 'anaconda show <USER/PACKAGE>' to get more details: Packages: Name | Version | Package Types | Platforms ------------------------- | ------ | --------------- | --------------- CS109/pyquery | 1.2.9 | conda | linux-64, win-32, win-64, linux-32, osx-64 : A jquery-like library for python asmeurer/pyquery | 1.2.6 | conda | osx-64 : https://github.com/gawel/pyquery auto/pyquery | 1.2.8 | conda | linux-64, linux-32, osx-64 : https://github.com/gawel/pyquery dan_blanchard/pyquery | 1.2.6 | conda | linux-64 : https://github.com/gawel/pyquery hargup/pyquery | | conda | None-None, linux-64 : A jquery-like library for python meloncholy/pyquery | 1.2.9 | conda | linux-64 : A jquery-like library for python mhworth/pyquery | 1.2.8 | conda | linux-64, osx-64 : A jquery-like library for python nbsantos/pyquery | 1.2.9 | conda | osx-64 : A jquery-like library for python pdrops/pyquery | 1.2.8 | conda | linux-64, osx-64 : A jquery-like library for python ziebel/pyquery | 1.2.9 | conda | linux-64 : A jquery-like library for python Found 10 packages

Then, picking a channel, do:

conda install pyquery -c CS109
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0

I tried almost all approaches above and failed. What worked for me was commenting out the 

export DYLD_LIBRARY_PATH=/usr/lib

in my bash profile. This line is added by the anaconda installer automatically.

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