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[jsinterp] Avoid double key lookup for setting new key
In order to add a new key to both __objects and __functions dicts on jsinterp.py, it is necessary to first verify if a key was present and if not, create the key and assign it to a value. However, this can be done with a single step using dict setdefault method.
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@ -131,9 +131,8 @@ def interpret_expression(self, expr, local_vars, allow_recursion):
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if variable in local_vars:
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obj = local_vars[variable]
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else:
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if variable not in self._objects:
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self._objects[variable] = self.extract_object(variable)
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obj = self._objects[variable]
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obj = self._objects.setdefault(
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variable, self.extract_object(variable))
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if arg_str is None:
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# Member access
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@ -204,8 +203,7 @@ def interpret_expression(self, expr, local_vars, allow_recursion):
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argvals = tuple([
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int(v) if v.isdigit() else local_vars[v]
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for v in m.group('args').split(',')])
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if fname not in self._functions:
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self._functions[fname] = self.extract_function(fname)
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self._functions.setdefault(fname, self.extract_function(fname))
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return self._functions[fname](argvals)
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raise ExtractorError('Unsupported JS expression %r' % expr)
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