add an assert statement to make sure that the prefix for den and num are the same

Author: Jingjing Tang

changehc/delphi_changehc/load_data.py

@@ -93,6 +93,10 @@ def load_combined_data(denom_filepath, covid_filepath, base_geo,
 
     # Get issue_date from the filename
     issue_date = datetime.strptime(covid_filepath.split("/")[-1][:8], "%Y%m%d")
+    assert (
+        issue_date == datetime.strptime(denom_filepath.split("/")[-1][:8], "%Y%m%d")
+    ), "The aggregated files used for Covid Claims and Total Claims should have the same drop date."
+    
 
     # load each data stream
     denom_data = load_chng_data(denom_filepath, issue_date, base_geo,
@@ -137,6 +141,10 @@ def load_cli_data(denom_filepath, flu_filepath, mixed_filepath, flu_like_filepat
 
     # Get issue_date from the filename
     issue_date = datetime.strptime(flu_filepath.split("/")[-1][:8], "%Y%m%d")
+    assert (
+        issue_date == datetime.strptime(denom_filepath.split("/")[-1][:8], "%Y%m%d")
+    ), "The aggregated files used for CLI Claims and Total Claims should have the same drop date."
+    
 
     # load each data stream
     denom_data = load_chng_data(denom_filepath, issue_date, base_geo,
@@ -188,6 +196,10 @@ def load_flu_data(denom_filepath, flu_filepath, base_geo,
 
     # Get issue_date from the filename
     issue_date = datetime.strptime(flu_filepath.split("/")[-1][:8], "%Y%m%d")
+    assert (
+        issue_date == datetime.strptime(denom_filepath.split("/")[-1][:8], "%Y%m%d")
+    ), "The aggregated files used for Flu Claims and Total Claims should have the same drop date."
+    
 
     # load each data stream
     denom_data = load_chng_data(denom_filepath, issue_date, base_geo,