Create database.py

database.py

@@ -0,0 +1,40 @@
+class CtatDatabase:
+    def __init__(self):
+        self.data = {}
+
+    def set(self, key, value):
+        self.data[key] = value
+
+    def get(self, key):
+        return self.data.get(key)
+
+    def delete(self, key):
+        if key in self.data:
+            del self.data[key]
+
+    def list_keys(self):
+        return list(self.data.keys())
+
+    def clear(self):
+        self.data.clear()
+
+# Example Usage:
+if __name__ == "__main__":
+    db = CtatDatabase()
+
+    db.set("name", "ctat")
+    db.set("language", "Python")
+    db.set("version", "1")
+
+    print("Name:", db.get("name"))
+    print("Language:", db.get("language"))
+
+    print("Keys:", db.list_keys())
+
+    db.delete("version")
+
+    print("Keys after deletion:", db.list_keys())
+
+    db.clear()
+
+    print("Keys after clearing:", db.list_keys())