Update sqlite3/Files/README.md

sqlite3/Files/README.md

@@ -1,10 +1,11 @@
 ```python
-import sqlite3, pandas as pd
-
+import pandas as pd
 
 class Files:
 
-    def __init__(self, db="files.sqlite"):
+    def __init__(self, db='files.sqlite'):
+        import sqlite3
+        if not db.endswith('.sqlite'): db += '.sqlite'
         self.conn = sqlite3.connect(db, isolation_level=None)
         self.conn.row_factory = sqlite3.Row
         self("PRAGMA journal_mode=WAL")
@@ -36,6 +37,7 @@ class Files:
     def __len__(self) -> int:
         return self("SELECT COUNT(*) FROM files").iloc[0, 0]
 
+
 files = Files()
 for filename in files:
     print(files[filename])