Add example for loading data

* Include backup from parquet example

Author: oscgonfer

examples/scripts/get_device_data.py

@@ -7,7 +7,6 @@
 # Set verbose level
 config.log_level = 'DEBUG'
 
-# Device id needs to be as str
 device = sc.Device(blueprint='sc_air',
                                params=sc.APIParams(id=16784))
 device.options.min_date = None #Don't trim min_date

examples/scripts/get_device_parquet.py

@@ -0,0 +1,23 @@
+#!/usr/bin/python
+
+'''
+Example to load device data from a parquet backup on AWS
+For this example to work, you need to have the following environment variables set:
+
+# S3 bucket
+S3_DATA_BUCKET=
+S3_PUBLIC_BUCKET=
+AWS_ACCESS_KEY_ID=
+AWS_SECRET_ACCESS_KEY=
+AWS_REGION=
+'''
+
+import scdata as sc
+device = sc.Device(blueprint='sc_air',
+                               params=sc.APIParams(id=18445))
+
+# Load
+device.backup_load()
+
+print (device.json)
+print (device.data.describe())