Question

pip install scrapy error with python 3 on Ubuntu 16.04

When starting this tutorial on using scrapy to crawl a site on a fresh Ubuntu 16.04 droplet with only python installed via apt install python python-pip - I ran the scrapy install command:

pip install scrapy

and got the following errors:

Failed building wheel for cryptography

and

Command "/usr/bin/python -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-uMrPxH/cryptography/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-w7GcS0-record/install-record.txt --single-version-externally-managed --compile" failed with error code 1 in /tmp/pip-build-uMrPxH/cryptography/

The Solution

I was missing some vital cryptography libs that scrapy depends on, to install them I ran:

sudo apt-get install build-essential libssl-dev libffi-dev python-dev
pip install cryptography

once that executed I could install scrapy with a pip install scrapy and get on with the excellent tutorial!


Submit an answer

This textbox defaults to using Markdown to format your answer.

You can type !ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link!

Sign In or Sign Up to Answer

These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.

Want to learn more? Join the DigitalOcean Community!

Join our DigitalOcean community of over a million developers for free! Get help and share knowledge in Q&A, subscribe to topics of interest, and get courses and tools that will help you grow as a developer and scale your project or business.

Thanks for your comment, I added

  1. sudo apt-get install build-essential libssl-dev libffi-dev python-dev

to the local Ubuntu 16.04 set-up tutorial in case others run into this issue.

No need to answer - just posting this for others who have the same issue.

For some reasons, it doesn’t work on ubuntu 14. Any more solutions?

Exact error is

error: command ‘x86_64-linux-gnu-gcc’ failed with exit status 1

----------------------------------------

Command “/home/work/Workspace/venv/tmtext/bin/python2.7 -u -c “import setuptools, tokenize;file=‘/tmp/pip-install-12TB2u/cryptography/setup.py’;f=getattr(tokenize, ‘open’, open)(file);code=f.read().replace(‘\r\n’, ‘\n’);f.close();exec(compile(code, file, ‘exec’))” install --record /tmp/pip-record-dfm5Vh/install-record.txt --single-version-externally-managed --compile --install-headers /home/work/Workspace/venv/tmtext/include/site/python2.7/cryptography” failed with error code 1 in /tmp/pip-install-12TB2u/cryptography/