From 67d618d4b2b5272f693db219e7a6d1e1d10343e5 Mon Sep 17 00:00:00 2001
From: wony <5218603+wony-zheng@users.noreply.github.com>
Date: Thu, 3 Nov 2022 17:08:22 +0800
Subject: [PATCH] Update cache.py (#1329)

make D.feature([symbol], [Feature('close')], disk_cache=1) work correctly
---
 qlib/data/cache.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/qlib/data/cache.py b/qlib/data/cache.py
index fc53aab3d..7c692377a 100644
--- a/qlib/data/cache.py
+++ b/qlib/data/cache.py
@@ -471,7 +471,7 @@ class DatasetCache(BaseProviderCache):
         not_space_fields = remove_fields_space(fields)
         data = data.loc[:, not_space_fields]
         # set features fields
-        data.columns = list(fields)
+        data.columns = [str(i) for i in fields]
         return data
 
     @staticmethod