Refuse to submit example solutions

Python/lib/__init__.py

@@ -39,8 +39,9 @@ DAY: int | None = None
 
 def read_input(year: int, day: int, example: int | None = None) -> str:
     global YEAR, DAY
-    YEAR = year
-    DAY = day
+    if example is None:
+        YEAR = year
+        DAY = day
     if example is None:
         f = Path(__file__).parent / f"../../.cache/{year}/{day}"
     else:
@@ -52,16 +53,22 @@ def ans(answer):
     print(answer)
     pyperclip.copy(str(answer))
 
-    submit_part = input("\nSubmit solution? level=")
-    if submit_part in ["1", "2"] and YEAR is not None and DAY is not None:
-        import bs4
-        import requests
+    if YEAR is None or DAY is None:
+        print("\n(cannot submit solution of example)")
+        return
 
-        session = (Path(__file__).parent / f"../../.cache/session").read_text()
-        resp = requests.post(
-            f"https://adventofcode.com/{YEAR}/day/{DAY}/answer",
-            cookies={"session": session},
-            data={"level": submit_part, "answer": answer},
-        ).text
-        bs = bs4.BeautifulSoup(resp, "html.parser")
-        print(bs.main.article.p.text)
+    submit_part = input("\nSubmit solution? level=")
+    if submit_part not in ["1", "2"]:
+        return
+
+    import bs4
+    import requests
+
+    session = (Path(__file__).parent / f"../../.cache/session").read_text()
+    resp = requests.post(
+        f"https://adventofcode.com/{YEAR}/day/{DAY}/answer",
+        cookies={"session": session},
+        data={"level": submit_part, "answer": answer},
+    ).text
+    bs = bs4.BeautifulSoup(resp, "html.parser")
+    print(bs.main.article.p.text)