On Tue, Apr 4, 2017 at 8:01 AM, <venkatachalam...@gmail.com> wrote: > Hello All, > > I am writing a python code for processing a data obtained from a sensor. > The data from sensor is obtained by executing a python script. The data > obtained should be further given to another python module where the > received data is used for adjusting the location of an object. > > For achieving this, there is a central bash script, which runs both the > python modules parallel. Something like: > > python a.py & > python b.py & > > I am trying to return the sensor data to the bash .sh file, therefore it > can be provided to the other script. This, based on the online tutorials > looks like: > > sensor_data=$(python execute_sensor_process.py) & > > and the sensor_data is assigned by printing the required data in the > corresponding python script. For example, the data is printed in > execute_sensor_process.py as follows: > > print >>sys.stderr,sens_data > > By printing the data onto sys.stderr and assigning a return variable in > the bash, I am expecting the data to be assigned. > > But this is not happening. The sensor data is a dictionary and I like to > have this data for further analysis. I am not getting the data returned > from the python script on to the bash variable. > > Can someone help me to understand why the code is not working? I tried > other approaches of function call such as > > > sensor_data=$`python execute_sensor_process.py` & > > > python execute_sensor_process.py tempfile.txt & > kinexon_data=`cat tempfile.txt` & > > But none of the approaches are working. > > Thank you, > Venkatachalam Srinivasan > -- > https://mail.python.org/mailman/listinfo/python-list >
I'm not sure why you need the data in a bash script. What can you do with a bash script that you can't do with Python? That said, it seems to me that you need a data persistence layer, i.e. a way to store the dictionary after it is created. My best advice would be to use the json module to write out to json files. I believe this is the best approach because json has a near 1-to-1 mapping with Python dictionaries. Json is also a good choice because almost every language has a json parser as part of it's standard library, making you data extremely portable. -- https://mail.python.org/mailman/listinfo/python-list
