fix function of get auth

Author: jayzhenghan

qcloud_cos/cos_auth.py

@@ -16,13 +16,15 @@ def filter_headers(data):
     :param data(dict): 所有的头部信息.
     :return(dict): 计算进签名的头部.
     """
-    valid_headers = ["cache-control",
-            "content-disposition",
-            "content-encoding",
-            "content-type",
-            "expires",
-            "content-md5",
-            "host"]
+    valid_headers = [
+        "cache-control",
+        "content-disposition",
+        "content-encoding",
+        "content-type",
+        "expires",
+        "content-md5",
+        "host"
+    ]
     headers = {}
     for i in data:
         if str.lower(i) in valid_headers or str.lower(i[0]) == "x":

ut/test.py

@@ -949,7 +949,7 @@ def test_put_get_delete_bucket_domain():
     }
 
     response = client.delete_bucket_domain(
-	Bucket=test_bucket
+	    Bucket=test_bucket
     ) 
 
     time.sleep(2)