fixed fetch_mathoverflow bug

fetch_mathoverflow.py

@@ -92,7 +92,7 @@ def iter_rows(path):
         if (element.tag == 'row'):
             yield element
 
-DATA_DIR = 'stack_exchange/mathoverflow.net'
+DATA_DIR = 'nothing'
 
 @dataclass
 class Comment:
@@ -103,7 +103,7 @@ class Comment:
     CreationDate: datetime
     UserId: Optional[int]
 
-@lru_cache()
+#lru_cache()
 def comments():
     path = os.path.join(DATA_DIR, 'Comments.xml')
     out = {}
@@ -130,7 +130,7 @@ class Post:
     Answers: Optional[List["Post"]] = skip(None)
     Tags: str = field(default="")
 
-@lru_cache()
+#@lru_cache()
 def questions():
     path = os.path.join(DATA_DIR, 'Posts.xml')
     cs = {}
@@ -183,6 +183,7 @@ def get_and_format(url, save_dir):
 
     global DATA_DIR
     DATA_DIR = os.path.join(save_dir, "xml")
+    print(f"DATA DIR {DATA_DIR}")
     os.system(f"7z e {archive_path} -o{DATA_DIR}")
 
     print("parsing xml...")