Implement normalize_lat_lng()

1 files changed, 8 insertions, 0 deletions

diff --git a/iss/utils.py b/iss/utils.py
index 326d835..656d4e3 100644
--- a/iss/utils.py
+++ b/iss/utils.py
@@ -7,6 +7,14 @@ def seconds_to_minutes(secs):
     return f"{secs // 60}:{secs % 60:02}"
 
 
+def normalize_lat_lng(lat, lng):
+    if lat[0] not in "NS" or lng[0] not in "EW":
+        raise Exception("Lat/lng must be formatted as N12.345 and E67.890")
+    nlat = float(lat[1:]) * (-1 if lat[0] == "S" else 1)
+    nlng = float(lng[1:]) * (-1 if lng[0] == "W" else 1)
+    return nlat, nlng
+
+
 def deg_to_cardinal(deg):
     cardinals = [
         "N",