Installing PyCrypto on Ubuntu - fatal error on build

Question

Having looked at other similar threads, I still can't get pycrypto running.

I'm trying to get it working on my Ubuntu laptop - but I couldn't manage it on my Windows PC either.

I downloaded pycrypto-2.6, extracted it, and ran

    python setup.py build

but then this happened

warning: GMP or MPIR library not found; Not building Crypto.PublicKey._fastmath.
building 'Crypto.Hash._MD2' extension
gcc -pthread -fno-strict-aliasing -fwrapv -Wall -Wstrict-prototypes -fPIC -std=c99 -O3 - fomit-frame-pointer -Isrc/ -I/usr/include/python2.7 -c src/MD2.c -o build/temp.linux-i686-?2.7/src/MD2.o
src/MD2.c:31:20: fatal error: Python.h: No such file or directory
compilation terminated.
error: command 'gcc' failed with exit status 1

Would appreciate any help.

You have no developing header for python. However, if you just need the module why don' you install by easy_install or pip ? — qrtt1, Jul 22 '12 at 00:23
Same error using easy_install (without the python-dev package). — Brent Faust, Aug 09 '14 at 07:21

score 154 · Accepted Answer · answered Jul 22 '12 at 00:18

154

You need to install the Python development files. I believe this will do it:

sudo apt-get install python-dev

answered Jul 22 '12 at 00:18

Ned Batchelder

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'sudo zypper in python-devel' for OpenSuse – sean_m Jun 01 '13 at 02:09
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For Python3: `apt-get install python3.2-dev` or `apt-get install python3.3-dev`, depending on distro – Nirvana Tikku Apr 24 '15 at 23:32
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`sudo dnf install python-devel` if you are in Fedora. – Bruno Casali Dec 03 '15 at 02:48
@NirvanaTikku had the answer that saved my life for python3.X . – Chris Dec 14 '16 at 16:54
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for python 3.6: `apt-get install python3.6-dev` – Berlin Apr 16 '17 at 07:07
for python 3.5: `apt-get install python3.5-dev` – greg_data Jun 14 '18 at 16:16
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for any python 3 version: `apt-get install python3-dev` – Yann Dìnendal Dec 19 '18 at 16:30
Just for those who arrives here with centos... ``yum install python-devel`` or ``yum install python36-devel`` – Daniel Argüelles Sep 25 '19 at 13:41

score 22 · Answer 2 · answered Feb 05 '14 at 00:31

22

On Ubuntu, I needed some other packages for it to succeed:

apt-get install autoconf g++ python2.7-dev
pip install pycrypto

answered Feb 05 '14 at 00:31

Homer6

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It also works on Ubuntu 16.04 LTS. I wonder why the wheel is missing from pypi for this package? – nagylzs Feb 27 '17 at 13:31

score 7 · Answer 3 · answered Feb 13 '18 at 14:37

7

On Ubuntu and if you use Python 3.x you will need:

sudo apt-get install gcc python3-dev

you probably already have gcc but just in case if you are trying this command from Dockerfile with base image python:3.6.4-slim-jessie then you will also need gcc.

answered Feb 13 '18 at 14:37

Luka Lopusina

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i actually needed to run `sudo apt-get install python3.7-dev` after running/installing `sudo apt-get install python3.7` not sure why `python3-dev` doesn't cover this via apt-get dependencies, but it works. – Edward Oct 04 '19 at 11:04
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@Edward your comment just saved me in AWS CodeBuild in July 2021.. possibly post it as an answer. – Tommy Jul 08 '21 at 21:33

score 2 · Answer 4 · answered Aug 06 '21 at 15:56

2

August 2021

For python 3.8 users run

sudo apt-get install python3.8-dev

and try to install pycrypto again

pip install pycrypto

answered Aug 06 '21 at 15:56

babatunde adewole

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It's better to use "python3-dev", which is a meta package that will automatically choose the correct package based on the installed python version. – Frank Mar 23 '22 at 06:52

Installing PyCrypto on Ubuntu - fatal error on build

4 Answers4