code: def at_radius(self, df: pd.DataFrame, radius: float):
      return (df[df.columns[1]] & (df[df.columns[2]] >= radius)).mean()
  
imports: from easydict import EasyDict
  from typing import *
  import math
  import matplotlib
  import matplotlib.pyplot
  import numpy
  import os
  import pandas
  import seaborn
label_desc: Use image node_id 3 for calling the ApproximateAccuracy_API obj's underlying member method code with example usage: obj.at_radius(df, radius) and returns: unknown