ref: extract base url

app/settings.py

@@ -11,6 +11,9 @@ SAVE_DIR = "/tmp/grib/"  # don't forget to create it!
 
 MAX_FORECAST_HOUR = 5  # 0-384 beware, each file is 500mb
 
+# Base URL
+GFS_BASE_URL = "https://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs"
+
 # Globals with variable names and comments how to get them
 """
 has_height_attr_names = {

services/grib/service.py

@@ -41,7 +41,10 @@ class Grib:
 
         date_str = target_time.strftime("%Y%m%d")
         hour_str = str((target_time.hour // 6) * 6).zfill(2)
-        target_url = f"https://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.{date_str}/{hour_str}/{looking_at}/gfs.t{hour_str}z.pgrb2.0p25.f{prod_hour}"
+        target_url = (
+            GFS_BASE_URL
+            + f".{date_str}/{hour_str}/{looking_at}/gfs.t{hour_str}z.pgrb2.0p25.f{prod_hour}"
+        )
         return target_url
 
     @staticmethod
@@ -63,7 +66,10 @@ class Grib:
 
         date_str = target_time.strftime("%Y%m%d")
         hour_str = str((target_time.hour // 6) * 6).zfill(2)
-        target_url = f"https://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.{date_str}/{hour_str}/{looking_at}/gridded/gfs{looking_at}.t{hour_str}z.global.0p25.f{prod_hour}.grib2"
+        target_url = (
+            GFS_BASE_URL
+            + f".{date_str}/{hour_str}/{looking_at}/gridded/gfs{looking_at}.t{hour_str}z.global.0p25.f{prod_hour}.grib2"
+        )
         return target_url
 
     @staticmethod