file function but found a head bug

mswp.py

@@ -1,6 +1,3 @@
-from config import jsondata
-
-
 class Datapack:
     def __init__(self, method='post', app='all', version='msw/1.0', head={}, body=b'', check_head=True):
         self.method = method
@@ -22,6 +19,7 @@ class Datapack:
         self.encode_data = first_line + b'\n' + heads + b'\n' + self.body
 
     def decode(self, only_head=False):
+        self.head = {}
         index = self.encode_data.index(b'\n\n')
         upper = self.encode_data[:index]
         if not only_head:
@@ -37,10 +35,3 @@ class Datapack:
             self.head[i] = ii
         if only_head:
             return self.encode_data[index+2:]
-
-        
-def split_dp_data(data):
-    pass
-
-
-