[Solved] Python - Dictionary?

Brad Buskey

I am stuck - supposedly this line (given from ubus -S call gps info written to a file) is in the correct format to be considered a "dictionary object" by python. Is there something else I should be using?

{"age":6357,"latitude":"38.1234","longitude":"-80.1234","elevation":"1234.5","course":"12.34","speed":"N"}

However, when I try and read out the data with the following script:
#!/usr/bin/env python

gpsfile=open('/root/gpsinfo.txt', 'r')
gpsinfo=gpsfile.read()

age=gpsinfo['age']
lat=gpsinfo['latitude']
lon=gpsinfo['longitude']
elv=gpsinfo['elevation']
cou=gpsinfo['course']
spd=gpsinfo['speed']

print "Age: "+age
print "Latitude: "+lat
print "Latitude: "+lon
print "Longitude: "+elv
print "Course: "+cou
print "Speed: "+spd

exit()

I just get the following error:
Traceback (most recent call last):
File "test.py", line 10, in <module>
age=gpsinfo['age']
TypeError: string indices must be integers, not str

Zogg Baubas

gpsfile=open('/root/gpsinfo.txt', 'r')
gpsinfo=gpsfile.read()

read() method returns string here, as you are simply reading a file.

If this is the actual data from the file, with double quotes around key names and values:

{"age":6357,"latitude":"38.1234","longitude":"-80.1234","elevation":"1234.5","course":"12.34","speed":"N"}

Then you can use json to load it up. This should work:

#!/usr/bin/env python
import json

from pprint import pprint


with file('/root/gpsinfo.txt', 'r') as gpsfile:
    gpsinfo = json.load(gpsfile)

age = gpsinfo['age']
lat = gpsinfo['latitude']
lon = gpsinfo['longitude']
elv = gpsinfo['elevation']
cou = gpsinfo['course']
spd = gpsinfo['speed']

pprint(("Age: " + age,
        "Latitude: " + lat,
        "Latitude: " + lon,
        "Longitude: " + elv,
        "Course: " + cou,
        "Speed: " + spd))

exit()

Brad Buskey

Thank you, thank you, thank you! I have been spinning my wheels for hours now. That works, and I have incorporated it into my actual script.

May even throw it up as a project!

Zogg Baubas

@Brad-Buskey Your welcome. And share your projects!

P.S. fixed a typo in my code sample.

Theodore Borromeo

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