add works in progress

DownloadCurrents.py

@@ -26,12 +26,13 @@ import bz2
 import subprocess
 import pygrib
 import re
-from datetime import date
+from datetime import date,timedelta
 
-def build_url(base_url, basename):
+def build_url(base_url, basename,previousday=0):
     # today = datetime.datetime.utcnow().strftime("%d%m%y")
-    today = date.today().strftime("%y%m%d")
-    filename = f"{basename}_{today}-12.grb.bz2"
+    today = date.today()
+    target = (today - timedelta(previousday)).strftime("%y%m%d")
+    filename = f"{basename}_{target}-12.grb.bz2"
     grib_filename = filename.replace(".bz2", "")
     return base_url + filename, filename, grib_filename
 
@@ -165,12 +166,12 @@ def main():
     merged_filename = "merged.grb"
     
     url, bz2_filename, grib_a_filename = build_url("https://openskiron.org/gribs_wrf_4km/","Dunkirk_4km_WRF_WAM")
-    #download_file(url, bz2_filename)
-    #decompress_bz2(bz2_filename, grib_a_filename)
+    download_file(url, bz2_filename)
+    decompress_bz2(bz2_filename, grib_a_filename)
 
     url, bz2_filename, grib_b_filename = build_url("https://openskiron.org/gribs_wrf_4km/","Hastings_4km_WRF_WAM")
-    #download_file(url, bz2_filename)
-    #decompress_bz2(bz2_filename, grib_b_filename)
+    download_file(url, bz2_filename)
+    decompress_bz2(bz2_filename, grib_b_filename)
 
     extract_surface_current(grib_a_filename,"surfacea.grb")
     extract_surface_current(grib_b_filename,"surfaceb.grb")