import json
# sudo pip install request
import requests
pid = 'DK5QPID'
res_shadows = requests.get(backendUrl + '/api/1.0/signals' + '/pid/'+ pid + '/shadows', headers=headers)
# checking the response
if res_shadows.ok:
print "OK"
print res_shadows.text
else:
print "Error: " + res_shadows.text