From 633af182f49336296d55045fb89d3f9a3c247d71 Mon Sep 17 00:00:00 2001
From: Jactus <dw1920@nyu.edu>
Date: Mon, 9 Nov 2020 22:15:41 +0800
Subject: [PATCH] Fix read_bin bug

---
 qlib/utils/__init__.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/qlib/utils/__init__.py b/qlib/utils/__init__.py
index d0b47d3cd..900d9e115 100644
--- a/qlib/utils/__init__.py
+++ b/qlib/utils/__init__.py
@@ -44,7 +44,7 @@ def read_bin(file_path, start_index, end_index):
         ref_start_index = int(np.frombuffer(f.read(4), dtype="<f")[0])
         si = max(ref_start_index, start_index)
         if si > end_index:
-            return pd.Series(np.float32)
+            return pd.Series(dtype=np.float32)
         # calculate offset
         f.seek(4 * (si - ref_start_index) + 4)
         # read nbytes