From f2127941f2ad63db9a3265e46de65e5822c390b2 Mon Sep 17 00:00:00 2001
From: Mr-Milk <yzheng@cemm.at>
Date: Fri, 1 Dec 2023 10:32:58 +0100
Subject: [PATCH] Fix parsing metadata error

---
 lazyslide/readers/base.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lazyslide/readers/base.py b/lazyslide/readers/base.py
index befa8c1..5488d05 100644
--- a/lazyslide/readers/base.py
+++ b/lazyslide/readers/base.py
@@ -123,7 +123,7 @@ def _get_best_level_to_downsample(self, factor):
 
 
 def parse_metadata(filename, metadata: Dict):
-    fields = set(metadata.values())
+    fields = set(metadata.keys())
 
     mpp_keys = []
     # openslide specific mpp keys
@@ -168,7 +168,7 @@ def parse_metadata(filename, metadata: Dict):
     if N_LEVEL_KEY in fields:
         n_level_tmp = metadata.get(N_LEVEL_KEY)
         if n_level_tmp is not None:
-            n_level = n_level_tmp
+            n_level = int(n_level_tmp)
 
         for level in range(n_level):
             height = metadata.get(LEVEL_HEIGHT_KEY(level))