Added URL option to fetch

Author: wifijt

adafruit_pyportal.py

@@ -41,6 +41,12 @@
   https://github.com/adafruit/circuitpython/releases
 
 * Adafruit's Bus Device library: https://github.com/adafruit/Adafruit_CircuitPython_BusDevice
+"""
+"""
+04/19/2019
+John Turner
+Added ability to call the fetch object with a URL fetch(URL) this allows the URL to be updated once pyportal is initialized
+
 """
 
 import os
@@ -646,9 +652,13 @@ def image_converter_url(image_url, width, height, color_depth=16):
                                           width, height,
                                           color_depth, image_url)
 
-    def fetch(self):
+    def fetch(self, refresh_url=None):
         """Fetch data from the url we initialized with, perfom any parsing,
-        and display text or graphics. This function does pretty much everything"""
+        and display text or graphics. This function does pretty much everything
+        Optionally update the URL
+        """
+        if refresh_url:
+            self._url = refresh_url
         json_out = None
         image_url = None
         values = []