RFC: simplify AnalysisCallback implementation

Author: neutrinoceros

yt_astro_analysis/halo_analysis/halo_catalog/analysis_operators.py

@@ -21,14 +21,10 @@ class AnalysisCallback:
     to the target object, write out data, etc, but does not return anything.
     """
 
-    def __init__(self, function, args=None, kwargs=None):
+    def __init__(self, function, *args, **kwargs):
         self.function = function
         self.args = args
-        if self.args is None:
-            self.args = []
         self.kwargs = kwargs
-        if self.kwargs is None:
-            self.kwargs = {}
 
     def __call__(self, target):
         self.function(target, *self.args, **self.kwargs)
@@ -49,9 +45,6 @@ class AnalysisFilter(AnalysisCallback):
     whether analysis is continued.
     """
 
-    def __init__(self, function, *args, **kwargs):
-        AnalysisCallback.__init__(self, function, args, kwargs)
-
     def __call__(self, target):
         return self.function(target, *self.args, **self.kwargs)
 
@@ -69,9 +62,6 @@ class AnalysisQuantity(AnalysisCallback):
     performs some analysis, and then returns a value.
     """
 
-    def __init__(self, function, *args, **kwargs):
-        AnalysisCallback.__init__(self, function, args, kwargs)
-
     def __call__(self, target):
         return self.function(target, *self.args, **self.kwargs)