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ImportError: No module named PCANBasic,on python
Posted: Wed 8. May 2019, 02:03
by MrSingh
I've installed the PCANBasic api into my ubuntu 18.04 as per the given instructions in the manual.
But while importing the PCANBasic, using
in my python program, it shows an import error.
Is this related to some directory issue? Should I copy the API files to some location? I have python 2.7 on my system.
Re: ImportError: No module named PCANBasic,on python
Posted: Wed 8. May 2019, 09:49
by M.Maidhof
Hi,
please post output of cat /proc/pcan, to see if the chardev driver is installed
regards
Michael
Re: ImportError: No module named PCANBasic,on python
Posted: Fri 10. May 2019, 14:49
by MrSingh
Sorry for late reply. Got caught up in another project.
Here's the output of the cat /proc/pcan
Code: Select all
*------------- PEAK-System CAN interfaces (www.peak-system.com) -------------
*------------- Release_20190412_n (8.8.0) May 7 2019 23:31:42 --------------
*------------- [mod] [isa] [pci] [pec] [dng] [par] [usb] [pcc] --------------
*--------------------- 1 interfaces @ major 236 found -----------------------
*n -type- -ndev- --base-- irq --btr- --read-- --write- --irqs-- -errors- status
32 usb -NA- ffffffff 030 0x001c 0000000b 00000019 0000452c 0000683e 0x0080
Re: ImportError: No module named PCANBasic,on python
Posted: Fri 10. May 2019, 16:26
by M.Maidhof
Hi,
please send us the outputs when you build and install the pcanbasic API package.
Did you run one of our test apps for pcanbasic?
regards
Michael
Re: ImportError: No module named PCANBasic,on python
Posted: Fri 10. May 2019, 16:49
by MrSingh
The outputs for building and installing pcanbasic api :
Code: Select all
~/PCAN/PCAN-Basic_Linux-4.3.1/libpcanbasic$ make clean
make[1]: Entering directory '/home/akash/PCAN/PCAN-Basic_Linux-4.3.1/libpcanbasic/pcanbasic'
Considering PCANBasic library with FD support (PCAN driver >= 8.0)
rm -f src/*~ src/*.o *~ *.so.* *.so libpcanfd.o
make[1]: Leaving directory '/home/akash/PCAN/PCAN-Basic_Linux-4.3.1/libpcanbasic/pcanbasic'
make[1]: Entering directory '/home/akash/PCAN/PCAN-Basic_Linux-4.3.1/libpcanbasic/pcaninfo'
rm -f src/*~ src/*.o ../pcanbasic/src/*~ ../pcanbasic/src/*.o *~ *.so.* *.so pcaninfo.1.0.2 pcaninfo
make[1]: Leaving directory '/home/akash/PCAN/PCAN-Basic_Linux-4.3.1/libpcanbasic/pcaninfo'
make[1]: Entering directory '/home/akash/PCAN/PCAN-Basic_Linux-4.3.1/libpcanbasic/examples'
make[2]: Entering directory '/home/akash/PCAN/PCAN-Basic_Linux-4.3.1/libpcanbasic/examples/python'
rm -f *.pyc
make[2]: Leaving directory '/home/akash/PCAN/PCAN-Basic_Linux-4.3.1/libpcanbasic/examples/python'
make[2]: Entering directory '/home/akash/PCAN/PCAN-Basic_Linux-4.3.1/libpcanbasic/examples/c++'
rm -f src/*~ src/*.o *~ pcanwrite pcanread pcaneventread pcaneventwrite
make[2]: Leaving directory '/home/akash/PCAN/PCAN-Basic_Linux-4.3.1/libpcanbasic/examples/c++'
make[1]: Leaving directory '/home/akash/PCAN/PCAN-Basic_Linux-4.3.1/libpcanbasic/examples'
Code: Select all
~/PCAN/PCAN-Basic_Linux-4.3.1/libpcanbasic$ make
make[1]: Entering directory '/home/akash/PCAN/PCAN-Basic_Linux-4.3.1/libpcanbasic/pcanbasic'
Considering PCANBasic library with FD support (PCAN driver >= 8.0)
***
*** Making PCANBasic library with FD support (PCAN driver >= 8.0)
***
*** target=libpcanbasic
*** version=4.3.1
*** PCAN_ROOT=src/pcan
*** gcc version=7
***
gcc -fPIC -shared -O2 -Wall -Wcast-align -Wcast-qual -Wimplicit -Wpointer-arith -Wswitch -Wredundant-decls -Wreturn-type -Wunused -DNO_RT -Isrc/pcan/driver -Isrc/pcan/lib -c src/libpcanbasic.c -o src/libpcanbasic.o
gcc -fPIC -shared -O2 -Wall -Wcast-align -Wcast-qual -Wimplicit -Wpointer-arith -Wswitch -Wredundant-decls -Wreturn-type -Wunused -DNO_RT -Isrc/pcan/driver -Isrc/pcan/lib -c src/pcaninfo.c -o src/pcaninfo.o
gcc -fPIC -shared -O2 -Wall -Wcast-align -Wcast-qual -Wimplicit -Wpointer-arith -Wswitch -Wredundant-decls -Wreturn-type -Wunused -DNO_RT -Isrc/pcan/driver -Isrc/pcan/lib -c src/pcanlog.c -o src/pcanlog.o
gcc -fPIC -shared -O2 -Wall -Wcast-align -Wcast-qual -Wimplicit -Wpointer-arith -Wswitch -Wredundant-decls -Wreturn-type -Wunused -DNO_RT -Isrc/pcan/driver -Isrc/pcan/lib -c src/pcbcore.c -o src/pcbcore.o
gcc -fPIC -shared -O2 -Wall -Wcast-align -Wcast-qual -Wimplicit -Wpointer-arith -Wswitch -Wredundant-decls -Wreturn-type -Wunused -DNO_RT -Isrc/pcan/driver -Isrc/pcan/lib -c src/pcblog.c -o src/pcblog.o
gcc -fPIC -shared -O2 -Wall -Wcast-align -Wcast-qual -Wimplicit -Wpointer-arith -Wswitch -Wredundant-decls -Wreturn-type -Wunused -DNO_RT -Isrc/pcan/driver -Isrc/pcan/lib -c src/pcbtrace.c -o src/pcbtrace.o
gcc -fPIC -shared -O2 -Wall -Wcast-align -Wcast-qual -Wimplicit -Wpointer-arith -Wswitch -Wredundant-decls -Wreturn-type -Wunused -DNO_RT -Isrc/pcan/driver -Isrc/pcan/lib -c src/pcan/lib/src/libpcanfd.c -o src/libpcanfd.o
gcc -shared -Wl,-soname,libpcanbasic.so -o libpcanbasic.so.4.3.1 src/libpcanbasic.o src/pcaninfo.o src/pcanlog.o src/pcbcore.o src/pcblog.o src/pcbtrace.o src/libpcanfd.o -lm
ln -sf libpcanbasic.so.4.3.1 libpcanbasic.so
make[1]: Leaving directory '/home/akash/PCAN/PCAN-Basic_Linux-4.3.1/libpcanbasic/pcanbasic'
make[1]: Entering directory '/home/akash/PCAN/PCAN-Basic_Linux-4.3.1/libpcanbasic/pcaninfo'
*** Making PCANINFO
***
*** target=pcaninfo
*** version=1.0.2
*** PCAN_ROOT=../pcanbasic/src/pcan
*** gcc version=7
***
gcc src/main.c ../pcanbasic/src/pcanlog.c ../pcanbasic/src/pcblog.c ../pcanbasic/src/pcbtrace.c ../pcanbasic/src/pcbcore.c ../pcanbasic/src/pcaninfo.c ../pcanbasic/src/pcan/lib/src/libpcanfd.c -O2 -Wall -Wcast-align -Wcast-qual -Wimplicit -Wpointer-arith -Wswitch -Wredundant-decls -Wreturn-type -Wunused -DNO_RT -I../pcanbasic/src -I../pcanbasic/src/pcan/driver -I../pcanbasic/src/pcan/lib -lm -o pcaninfo.1.0.2
ln -sf pcaninfo.1.0.2 pcaninfo
make[1]: Leaving directory '/home/akash/PCAN/PCAN-Basic_Linux-4.3.1/libpcanbasic/pcaninfo'
make[1]: Entering directory '/home/akash/PCAN/PCAN-Basic_Linux-4.3.1/libpcanbasic/examples'
make[2]: Entering directory '/home/akash/PCAN/PCAN-Basic_Linux-4.3.1/libpcanbasic/examples/python'
make[2]: Nothing to be done for 'all'.
make[2]: Leaving directory '/home/akash/PCAN/PCAN-Basic_Linux-4.3.1/libpcanbasic/examples/python'
make[2]: Entering directory '/home/akash/PCAN/PCAN-Basic_Linux-4.3.1/libpcanbasic/examples/c++'
***
*** Making PCANBasic C++ examples
***
*** target=pcanwrite pcanread pcaneventread pcaneventwrite
*** g++ version=7
*** PCANBASIC_ROOT=../../pcanbasic
***
g++ -I../../pcanbasic -I../../pcanbasic/src/pcan/driver -DNO_RT src/pcanwrite.cpp -L../../pcanbasic -Wl,-rpath ../../pcanbasic -lpcanbasic -o pcanwrite
g++ -I../../pcanbasic -I../../pcanbasic/src/pcan/driver -DNO_RT src/pcanread.cpp -L../../pcanbasic -Wl,-rpath ../../pcanbasic -lpcanbasic -o pcanread
g++ -I../../pcanbasic -I../../pcanbasic/src/pcan/driver -DNO_RT src/pcaneventread.cpp -L../../pcanbasic -Wl,-rpath ../../pcanbasic -lpcanbasic -o pcaneventread
g++ -I../../pcanbasic -I../../pcanbasic/src/pcan/driver -DNO_RT src/pcaneventwrite.cpp -L../../pcanbasic -Wl,-rpath ../../pcanbasic -lpcanbasic -o pcaneventwrite
make[2]: Leaving directory '/home/akash/PCAN/PCAN-Basic_Linux-4.3.1/libpcanbasic/examples/c++'
make[1]: Leaving directory '/home/akash/PCAN/PCAN-Basic_Linux-4.3.1/libpcanbasic/examples'
Code: Select all
~/PCAN/PCAN-Basic_Linux-4.3.1/libpcanbasic$ sudo make install
[sudo] password for akash:
make[1]: Entering directory '/home/akash/PCAN/PCAN-Basic_Linux-4.3.1/libpcanbasic/pcanbasic'
Considering PCANBasic library with FD support (PCAN driver >= 8.0)
cp libpcanbasic.so.4.3.1 /usr/lib/libpcanbasic.so.4.3.1
ln -sf /usr/lib/libpcanbasic.so.4.3.1 /usr/lib/libpcanbasic.so.4
ln -sf /usr/lib/libpcanbasic.so.4.3.1 /usr/lib/libpcanbasic.so.0
ln -sf /usr/lib/libpcanbasic.so.4 /usr/lib/libpcanbasic.so
cp PCANBasic.h /usr/include/PCANBasic.h
chmod 644 /usr/include/PCANBasic.h
/sbin/ldconfig
make[1]: Leaving directory '/home/akash/PCAN/PCAN-Basic_Linux-4.3.1/libpcanbasic/pcanbasic'
make[1]: Entering directory '/home/akash/PCAN/PCAN-Basic_Linux-4.3.1/libpcanbasic/pcaninfo'
cp pcaninfo.1.0.2 /usr/local/bin/pcaninfo
chmod 755 /usr/local/bin/pcaninfo
make[1]: Leaving directory '/home/akash/PCAN/PCAN-Basic_Linux-4.3.1/libpcanbasic/pcaninfo'
make[1]: Entering directory '/home/akash/PCAN/PCAN-Basic_Linux-4.3.1/libpcanbasic/examples'
make[2]: Entering directory '/home/akash/PCAN/PCAN-Basic_Linux-4.3.1/libpcanbasic/examples/python'
make[2]: Nothing to be done for 'install'.
make[2]: Leaving directory '/home/akash/PCAN/PCAN-Basic_Linux-4.3.1/libpcanbasic/examples/python'
make[2]: Entering directory '/home/akash/PCAN/PCAN-Basic_Linux-4.3.1/libpcanbasic/examples/c++'
#cp pcanwrite pcanread pcaneventread pcaneventwrite /usr/local/bin
make[2]: Leaving directory '/home/akash/PCAN/PCAN-Basic_Linux-4.3.1/libpcanbasic/examples/c++'
make[1]: Leaving directory '/home/akash/PCAN/PCAN-Basic_Linux-4.3.1/libpcanbasic/examples'
I tried running the python example file, PCANBasic.py, but it gives me the import library error, for which I started this thread.
Best Regards
Akash
Re: ImportError: No module named PCANBasic,on python
Posted: Mon 13. May 2019, 02:26
by MrSingh
I tried running the receivetest, and got the following output.
Code: Select all
$ /usr/local/bin/receivetest -f=/dev/pcan32 -e
receivetest Version "Release_20150611_n" (www.peak-system.com)
------- Copyright (C) 2004-2009 PEAK System-Technik GmbH ------
receivetest comes with ABSOLUTELY NO WARRANTY. This is free
software and you are welcome to redistribute it under certain
conditions. For details see attached COPYING file.
receivetest: device node="/dev/pcan32"
Extended frames are accepted, init with 500 kbit/sec.
receivetest: driver version = Release_20190412_n
2928728910.987 receivetest: x - 0x00000001 4 00 00 00 00
receivetest: pending CAN status 0x0020 read.
^Creceivetest: type = usb
Serial Number = 0xffffffff
Device Number = 30
count of reads = 1
count of writes = 0
count of errors = 0
count of irqs = 26
last CAN status = 0x0000
last error = 0
open paths = 1
driver version = Release_20190412_n
receivetest: finished (0): 1 message(s) received
Does this mean driver has not been correctly installed?
Re: ImportError: No module named PCANBasic,on python
Posted: Mon 13. May 2019, 11:09
by F.Vergnaud
Hello,
Can you copy the result of the following commands.
Code: Select all
# moves to the PCANBasic python example directory
cd ~/PCAN/PCAN-Basic_Linux-4.3.1/
cd libpcanbasic/examples/python/
# fetches the name of the PCANBasic library that is loaded by python
grep -e '__m_dllBasic = cdll.LoadLibrary(".*")' PCANBasic.py
# asserts the above library exists in the filesystem
ls -al /usr/lib/`grep -e '__m_dllBasic = cdll.LoadLibrary(".*")' PCANBasic.py | sed 's:^.*"\(.*\)".*$:\1:'`
You should expect a valid symlink for the last command:
Code: Select all
lrwxrwxrwx 1 root root 26 13 mai 10:12 /usr/lib/libpcanbasic.so -> /usr/lib/libpcanbasic.so.4
Finally can you copy the output of the PCANBasic import from a python console:
Code: Select all
python2.7
>>> from PCANBasic import *
Thank you.
Re: ImportError: No module named PCANBasic,on python
Posted: Mon 13. May 2019, 16:08
by MrSingh
OK. The import works in the terminal now, although I did try before as well.
But Still does not work in PyCharm.
This is the output in Pycharm
Code: Select all
from PCANBasic import *
ImportError: No module named PCANBasic
The result of the first set of commands is same as expected, but I will put it here for clarity.
Code: Select all
~/PCAN/PCAN-Basic_Linux-4.3.1/libpcanbasic/examples/python$ grep -e '__m_dllBasic = cdll.LoadLibrary(".*")' PCANBasic.py
self.__m_dllBasic = cdll.LoadLibrary("libpcanbasic.so")
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~/PCAN/PCAN-Basic_Linux-4.3.1/libpcanbasic/examples/python$ ls -al /usr/lib/`grep -e '__m_dllBasic = cdll.LoadLibrary(".*")' PCANBasic.py | sed 's:^.*"\(.*\)".*$:\1:'`
lrwxrwxrwx 1 root root 26 maj 13 02:35 /usr/lib/libpcanbasic.so -> /usr/lib/libpcanbasic.so.4
Re: ImportError: No module named PCANBasic,on python
Posted: Mon 13. May 2019, 16:10
by MrSingh
MrSingh wrote:I tried running the receivetest, and got the following output.
Code: Select all
$ /usr/local/bin/receivetest -f=/dev/pcan32 -e
receivetest Version "Release_20150611_n" (www.peak-system.com)
------- Copyright (C) 2004-2009 PEAK System-Technik GmbH ------
receivetest comes with ABSOLUTELY NO WARRANTY. This is free
software and you are welcome to redistribute it under certain
conditions. For details see attached COPYING file.
receivetest: device node="/dev/pcan32"
Extended frames are accepted, init with 500 kbit/sec.
receivetest: driver version = Release_20190412_n
2928728910.987 receivetest: x - 0x00000001 4 00 00 00 00
receivetest: pending CAN status 0x0020 read.
^Creceivetest: type = usb
Serial Number = 0xffffffff
Device Number = 30
count of reads = 1
count of writes = 0
count of errors = 0
count of irqs = 26
last CAN status = 0x0000
last error = 0
open paths = 1
driver version = Release_20190412_n
receivetest: finished (0): 1 message(s) received
Does this mean driver has not been correctly installed?
But this behavior has still not changed.!!
Re: ImportError: No module named PCANBasic,on python
Posted: Mon 13. May 2019, 16:24
by F.Vergnaud
Sorry I didn't respond to your receivetest concern because it is working fine
This tool infinetely waits for CAN messages, you are receiving a single message which is a status frame stating that the device is up and active.
You then hit Ctrl-C (^C) which closed the application.
Back to python, your issue lies within the configuration of PyCharm IDE: you have to specify where to find the file PCANBasic.py.