SMbus

[Stefano58]

In Raspbian, how can I install SMBUS for python 3.2.3?
It works in python 2.7.3.
Thanks in advance

[DougieLawson]

sudo apt-get install python{,3}-smbus

[Stefano58]

Hi,
apt-get install python-smbus tell me "Unable to locate package ......"
apt-get install python3-smbus tell me "Unable to locate package ......"
apt-get install python.3-smbus tell me "Unable to locate package ......"
pip-3.2 install python-smbus tell me "No distributions at all found for python...."
pip-3.2 install python3-smbus tell me "No distributions at all found for python...."
pip-3.2 install python.3-smbus tell me "No distributions at all found for python...."


Sorry for personal message, how can I send the message on the forum?

[DougieLawson]

You're going to have to build the code from source

Code: Select all

sudo -i
apt-get install libi2c-dev
cd /tmp
wget http://ftp.de.debian.org/debian/pool/main/i/i2c-tools/i2c-tools_3.1.0.orig.tar.bz2
tar xavf i2c-tools_3.1.0.orig.tar.bz2
cd i2c-tools-3.1.0/py-smbus
python3 setup.py install
exit

More details here: http://www.raspberrypi.org/forums/viewt ... 32&t=22348


"No personal messages" is just a line in my standard forum signature.

[Stefano58]

Hi,
when I write "python3 setup.py install", Raspberry (Raspbian) responde a lot of warnings and:
"error: command 'gcc' failed with exit status 1".
What's the problem now.
thanks

[DougieLawson]

You'll need to report that to the package maintainer.

[Stefano58]

Hi, is it enough?
----------------------------------------------
root@raspberrypi:/tmp/i2c-tools-3.1.0/py-smbus# python3 setup.py install
running install
running build
running build_ext
building 'smbus' extension
gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -D_FORTIFY_SOURCE=2 -g -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -fPIC -I/usr/include/python3.2mu -c smbusmodule.c -o build/temp.linux-armv6l-3.2/smbusmodule.o
smbusmodule.c: In function ‘SMBus_dealloc’:
smbusmodule.c:94:6: error: ‘SMBus’ has no member named ‘ob_type’
smbusmodule.c: In function ‘SMBus_list_to_data’:
smbusmodule.c:434:3: warning: implicit declaration of function ‘PyInt_Check’ [-Wimplicit-function-declaration]
smbusmodule.c:438:3: warning: implicit declaration of function ‘PyInt_AS_LONG’ [-Wimplicit-function-declaration]
smbusmodule.c: At top level:
smbusmodule.c:637:2: warning: missing braces around initializer [-Wmissing-braces]
smbusmodule.c:637:2: warning: (near initialization for ‘SMBus_type.ob_base.ob_base’) [-Wmissing-braces]
smbusmodule.c:639:2: warning: initialization makes integer from pointer without a cast [enabled by default]
smbusmodule.c:639:2: warning: (near initialization for ‘SMBus_type.tp_basicsize’) [enabled by default]
smbusmodule.c:642:2: warning: initialization from incompatible pointer type [enabled by default]
smbusmodule.c:642:2: warning: (near initialization for ‘SMBus_type.tp_print’) [enabled by default]
smbusmodule.c:657:2: warning: initialization makes pointer from integer without a cast [enabled by default]
smbusmodule.c:657:2: warning: (near initialization for ‘SMBus_type.tp_doc’) [enabled by default]
smbusmodule.c:658:2: warning: initialization from incompatible pointer type [enabled by default]
smbusmodule.c:658:2: warning: (near initialization for ‘SMBus_type.tp_traverse’) [enabled by default]
smbusmodule.c:665:2: warning: initialization from incompatible pointer type [enabled by default]
smbusmodule.c:665:2: warning: (near initialization for ‘SMBus_type.tp_members’) [enabled by default]
smbusmodule.c:667:2: warning: initialization from incompatible pointer type [enabled by default]
smbusmodule.c:667:2: warning: (near initialization for ‘SMBus_type.tp_base’) [enabled by default]
smbusmodule.c:673:2: warning: initialization from incompatible pointer type [enabled by default]
smbusmodule.c:673:2: warning: (near initialization for ‘SMBus_type.tp_alloc’) [enabled by default]
smbusmodule.c:675:2: warning: initialization from incompatible pointer type [enabled by default]
smbusmodule.c:675:2: warning: (near initialization for ‘SMBus_type.tp_free’) [enabled by default]
smbusmodule.c: In function ‘initsmbus’:
smbusmodule.c:691:3: warning: ‘return’ with no value, in function returning non-void [-Wreturn-type]
smbusmodule.c:693:2: warning: implicit declaration of function ‘Py_InitModule3’ [-Wimplicit-function-declaration]
smbusmodule.c:693:4: warning: assignment makes pointer from integer without a cast [enabled by default]
error: command 'gcc' failed with exit status 1
root@raspberrypi:/tmp/i2c-tools-3.1.0/py-smbus#
---------------------------------------------------------------------------------------

[DougieLawson]

You need to send that to the package developer. It's not my code.

[Stefano58]

HI,
his is the correct procedure to install SMBus for python3
------------------------------------------
sudo -i
apt-get install libi2c-dev
cd /tmp
wget http://ftp.de.debian.org/debian/pool/ma ... ig.tar.bz2 # download Python 2 source
tar xavf i2c-tools_3.1.0.orig.tar.bz2
cd i2c-tools-3.1.0/py-smbus
mv smbusmodule.c smbusmodule.c.orig # backup
wget https://gist.githubusercontent.com/seba ... usmodule.c # download patched (Python 3) source
python3 setup.py build
python3 setup.py install
exit
----------------------------------

[LearningPerson]

Dear Stefano58:
Thank you for your post, I followed this but got a error that looked like this:
fatal error: Python.h: No such file or directory compilation terminated.
The solution was to use:
sudo apt-get install python3-dev
I suspect you already did that before your post, but for a new person (me) with a new Raspberry PI (me again) that solves the compile problem.
The Raspberry Pi I'm using (Linux 3.18.7, Python 3.2.3, IDLE 3.2.3) will now run a program containing
import smbus

(I just got the compile and run, no info on functioning properly yet.)