[jsinterp] super object in subclasses __init__

youtube_dl/jsinterp/jsinterp.py

@@ -10,6 +10,7 @@ from .jsgrammar import Token, token_keys
 
 class Context(object):
     def __init__(self, variables=None, ended=False):
+        super(Context, self).__init__()
         self.ended = ended
         self.no_in = True
         self.local_vars = {}
@@ -21,6 +22,7 @@ class Context(object):
 
 class Reference(object):
     def __init__(self, value, parent=None):
+        super(Reference, self).__init__()
         self._value = value
         self._parent = parent
 
@@ -61,6 +63,7 @@ class JSInterpreter(object):
     undefined = object()
 
     def __init__(self, code, variables=None):
+        super(JSInterpreter, self).__init__()
         self.code = code
         self.global_vars = {}
         if variables is not None:

youtube_dl/jsinterp/jsparser.py

@@ -8,6 +8,7 @@ from .tstream import TokenStream, convert_to_unary
 class Parser(object):
     
     def __init__(self, code, pos=0, stack_size=100):
+        super(Parser, self).__init__()
         self.token_stream = TokenStream(code, pos)
         self.stack_top = stack_size
         self._no_in = True

youtube_dl/jsinterp/tstream.py

@@ -104,6 +104,7 @@ def convert_to_unary(token_value):
 
 class TokenStream(object):
     def __init__(self, code, start=0):
+        super(TokenStream, self).__init__()
         self.code = code
         self.ended = False
         self.peeked = []