View Full Version : Using python libraries / modules in Lianja

2013-12-17, 11:11

I have this python program that uses GPSD (http://catb.org/gpsd/) to read data from a GPS connected to the machine. Here is the code that I use for this purpose. It works perfectly fine as a python program. But how do I get something like this to run within Lianja? How do I handle the imports/modules? I am a newbie to both Lianja / python, and hence the "starter's question" :o

#! /usr/bin/python
# Written by Dan Mandle http://dan.mandle.me September 2012
# License: GPL 2.0

import os
from gps import *
from time import *
import time
import threading

gpsd = None #seting the global variable

os.system('clear') #clear the terminal (optional)

class GpsPoller(threading.Thread):
def __init__(self):
global gpsd #bring it in scope
gpsd = gps(mode=WATCH_ENABLE) #starting the stream of info
self.current_value = None
self.running = True #setting the thread running to true

def run(self):
global gpsd
while gpsp.running:
gpsd.next() #this will continue to loop and grab EACH set of gpsd info to clear the buffer

if __name__ == '__main__':
gpsp = GpsPoller() # create the thread
gpsp.start() # start it up
while True:
#It may take a second or two to get good data
#print gpsd.fix.latitude,', ',gpsd.fix.longitude,' Time: ',gpsd.utc


print ' GPS reading'
print '----------------------------------------'
print 'latitude ' , gpsd.fix.latitude
print 'longitude ' , gpsd.fix.longitude
print 'time utc ' , gpsd.utc,' + ', gpsd.fix.time
print 'altitude (m)' , gpsd.fix.altitude
print 'eps ' , gpsd.fix.eps
print 'epx ' , gpsd.fix.epx
print 'epv ' , gpsd.fix.epv
print 'ept ' , gpsd.fix.ept
print 'speed (m/s) ' , gpsd.fix.speed
print 'climb ' , gpsd.fix.climb
print 'track ' , gpsd.fix.track
print 'mode ' , gpsd.fix.mode
print 'sats ' , gpsd.satellites

time.sleep(5) #set to whatever

except (KeyboardInterrupt, SystemExit): #when you press ctrl+c
print "\nKilling Thread..."
gpsp.running = False
gpsp.join() # wait for the thread to finish what it's doing
print "Done.\nExiting."

Thanks & Regards,

2013-12-18, 04:49
Hi Murali,

With the modules installed in the Lianja Python path under C:\lianja\scriptinglanguages\python\Lib\ (default installation) you should be able to import as in your existing Python code. Check out http://www.lianja.com/community/showthread.php?242-Using-Python-modules for information on Registry tweaks that may be required.

Remember that you can also use the Python tab in the Console Workspace to test out imports (and see any error messages if the modules aren't found) before running your complete script.



2013-12-18, 08:28
hi Yvonne,

Great, thanks! :cool: