add magtag demo that grabs latest NYC c19 positivity rate from

https://github.com/nychealth/coronavirus-data/

MagTag_NYC_Positivity/code.py

@@ -0,0 +1,69 @@
+# SPDX-FileCopyrightText: 2017 Scott Shawcroft, written for Adafruit Industries
+#
+# SPDX-License-Identifier: Unlicense
+import time
+from adafruit_magtag.magtag import MagTag
+
+# Set up where we'll be fetching data from
+# pylint: disable=line-too-long
+DATA_SOURCE = "https://raw.githubusercontent.com/nychealth/coronavirus-data/master/latest/pp-by-modzcta.csv"
+
+magtag = MagTag()
+magtag.network.connect()
+
+magtag.add_text(
+    text_font="Arial-Bold-12.bdf",
+    text_position=(10, 15),
+    line_spacing=0.75,
+)
+
+magtag.graphics.qrcode(b"https://www1.nyc.gov/site/doh/covid/covid-19-data.page",
+                       qr_size=2, x=220, y=50)
+
+timestamp = None
+
+while True:
+    header = None
+    latest = None
+
+    if not timestamp or (time.monotonic() - timestamp) > 60:  # once a minute
+        print("Try connecting...")
+        try:
+            response = magtag.network.requests.get(DATA_SOURCE)
+            text = response.text.split("\r\n")
+            header = text[0].split(",")
+            latest = text[-2].split(",")
+            for i, txt in enumerate(header):
+                header[i] = txt.strip('\"')
+            #print(header, latest)
+
+            man_idx = header.index("Manhattan")
+            bx_idx = header.index("Bronx")
+            bk_idx = header.index("Brooklyn")
+            qn_idx = header.index("Queens")
+            si_idx = header.index("Staten Island")
+            nyc_idx = header.index("Citywide")
+        except (ValueError, RuntimeError) as e:
+            print("Some error occured, retrying! -", e)
+            continue
+
+        print("Date:", latest[0])
+        mh_pp = float(latest[man_idx])
+        bx_pp = float(latest[bx_idx])
+        bk_pp = float(latest[bk_idx])
+        qn_pp = float(latest[qn_idx])
+        si_pp = float(latest[si_idx])
+        nyc_pp = float(latest[nyc_idx])
+        print("Manhattan:", mh_pp)
+        print("Bronx:", bx_pp)
+        print("Brooklyn:", bk_pp)
+        print("Queens:", qn_pp)
+        print("Staten Island:", si_pp)
+        print("Citywide:", nyc_pp)
+
+        print("Done!")
+        magtag.set_text("Date: %s / Citywide: %0.2f%%\nManhattan: %0.2f%%\nBronx: %0.2f%%\nBrooklyn: %0.2f%%\nQueens: %0.2f%%\nStaten: %0.2f%%" % \
+                         (latest[0], nyc_pp, mh_pp, bx_pp, bk_pp, qn_pp, si_pp))
+        timestamp = time.monotonic()
+
+    time.sleep(0.01)