Fix some pylint problems.

check-release.py

@@ -1,10 +1,9 @@
 #!/usr/bin/python3
 
 import argparse
-import requests
 import sys
-from datetime import date, datetime
-from dateutil.relativedelta import relativedelta
+from datetime import date, datetime, timedelta
+import requests
 
 verbose = False
 
@@ -40,8 +39,9 @@ def get_file_support() -> date:
     support_day = datetime.fromtimestamp(0)
     for line in lines:
         if "SUPPORT_END" in line:
-            key, value = line.split('=')
+            _, value = line.split('=')
             value = value.strip()
+    if value:
         support_day = date.fromisoformat(value)
     return support_day
 
@@ -53,18 +53,19 @@ def support_date_in_future() -> bool:
     # Get the necessary values from the operating system.
     today = datetime.today().date()
     log("Current date on tested system =>", today)
-    tomorrow = today + relativedelta(years=1)
-    log(f"Minimal future EOL =>", tomorrow)
+    tomorrow = today + timedelta(days=365)
+    log("Minimal SUPPORT_END calculated from system time =>", tomorrow)
     support = get_file_support()
-    log(f"/etc/os-release SUPPORT_END =>", support)
+    log("Real /etc/os-release SUPPORT_END =>", support)
 
     # Test if the support end date is in the future.
     result = False
     if support >= tomorrow:
-        log("SUPPORT_END is in the future.")
+        log("Real SUPPORT_END is one year in the future.")
         log("Test passed.")
         result = True
     else:
+        log("Real SUPPORT_END is NOT one year in the future.")
         log("Test failed.")
         result = False
     return result
@@ -76,4 +77,3 @@ if result:
     sys.exit(12)
 else:
     sys.exit(25)
-