Avoided parallel assignment in template classes.

django/contrib/admin/templatetags/log.py

@@ -5,7 +5,9 @@ register = template.Library()
 
 class AdminLogNode(template.Node):
     def __init__(self, limit, varname, user):
-        self.limit, self.varname, self.user = limit, varname, user
+        self.limit = limit
+        self.varname = varname
+        self.user = user
 
     def __repr__(self):
         return "<GetAdminLog Node>"

django/template/base.py

@@ -307,7 +307,8 @@ class Token:
             The line number the token appears on in the template source.
             This is used for traceback information and gettext files.
         """
-        self.token_type, self.contents = token_type, contents
+        self.token_type = token_type
+        self.contents = contents
         self.lineno = lineno
         self.position = position
 
@@ -671,13 +672,12 @@ class FilterExpression:
                     "%s|%s|%s" % (token[:upto], token[upto:start], token[start:])
                 )
             if var_obj is None:
-                var, constant = match["var"], match["constant"]
+                if constant := match["constant"]:
-                if constant:
                     try:
                         var_obj = Variable(constant).resolve({})
                     except VariableDoesNotExist:
                         var_obj = None
-                elif var is None:
+                elif (var := match["var"]) is None:
                     raise TemplateSyntaxError(
                         "Could not find variable at start of %s." % token
                     )
@@ -686,10 +686,9 @@ class FilterExpression:
             else:
                 filter_name = match["filter_name"]
                 args = []
-                constant_arg, var_arg = match["constant_arg"], match["var_arg"]
+                if constant_arg := match["constant_arg"]:
-                if constant_arg:
                     args.append((False, Variable(constant_arg).resolve({})))
-                elif var_arg:
+                elif var_arg := match["var_arg"]:
                     args.append((True, Variable(var_arg)))
                 filter_func = parser.find_filter(filter_name)
                 self.args_check(filter_name, filter_func, args)

django/template/defaulttags.py

@@ -44,7 +44,8 @@ class AutoEscapeControlNode(Node):
     """Implement the actions of the autoescape tag."""
 
     def __init__(self, setting, nodelist):
-        self.setting, self.nodelist = setting, nodelist
+        self.setting = setting
+        self.nodelist = nodelist
 
     def render(self, context):
         old_setting = context.autoescape
@@ -129,7 +130,8 @@ class DebugNode(Node):
 
 class FilterNode(Node):
     def __init__(self, filter_expr, nodelist):
-        self.filter_expr, self.nodelist = filter_expr, nodelist
+        self.filter_expr = filter_expr
+        self.nodelist = nodelist
 
     def render(self, context):
         output = self.nodelist.render(context)
@@ -162,7 +164,8 @@ class ForNode(Node):
     def __init__(
         self, loopvars, sequence, is_reversed, nodelist_loop, nodelist_empty=None
     ):
-        self.loopvars, self.sequence = loopvars, sequence
+        self.loopvars = loopvars
+        self.sequence = sequence
         self.is_reversed = is_reversed
         self.nodelist_loop = nodelist_loop
         if nodelist_empty is None:
@@ -249,7 +252,8 @@ class IfChangedNode(Node):
     child_nodelists = ("nodelist_true", "nodelist_false")
 
     def __init__(self, nodelist_true, nodelist_false, *varlist):
-        self.nodelist_true, self.nodelist_false = nodelist_true, nodelist_false
+        self.nodelist_true = nodelist_true
+        self.nodelist_false = nodelist_false
         self._varlist = varlist
 
     def render(self, context):
@@ -325,7 +329,9 @@ class IfNode(Node):
 
 class LoremNode(Node):
     def __init__(self, count, method, common):
-        self.count, self.method, self.common = count, method, common
+        self.count = count
+        self.method = method
+        self.common = common
 
     def render(self, context):
         try:
@@ -346,7 +352,8 @@ GroupedResult = namedtuple("GroupedResult", ["grouper", "list"])
 
 class RegroupNode(Node):
     def __init__(self, target, expression, var_name):
-        self.target, self.expression = target, expression
+        self.target = target
+        self.expression = expression
         self.var_name = var_name
 
     def resolve_expression(self, obj, context):

django/template/loader_tags.py

@@ -41,7 +41,9 @@ class BlockContext:
 
 class BlockNode(Node):
     def __init__(self, name, nodelist, parent=None):
-        self.name, self.nodelist, self.parent = name, nodelist, parent
+        self.name = name
+        self.nodelist = nodelist
+        self.parent = parent
 
     def __repr__(self):
         return "<Block Node: %s. Contents: %r>" % (self.name, self.nodelist)