code: def merge_dataframes(*dfs):
      '''A helper function for merging two dataframes that have the same indices, duplicate columns are removed
  
          :param dfs: a list of dataframes to be merged (note: they must have the same indices)
          :type dfs: list[pandas.DataFrame]
          :returns: pandas.DataFrame -- a merged dataframe
      '''
      merged_dataframe = pd.concat(dfs, axis=1, join_axes=[dfs[0].index])
      return merged_dataframe.transpose().drop_duplicates().transpose(f merge_dataframes(*dfs):
      '''A helper function for merging two dataframes that have the same indices, duplicate columns are removed
  
          :param dfs: a list of dataframes to be merged (note: they must have the same indices)
          :type dfs: list[pandas.DataFrame]
          :returns: pandas.DataFrame -- a merged dataframe
      '''
      merged_dataframe = pd.concat(dfs, axis=1, join_axes=[dfs[0].index])
      return merged_dataframe.transpose().drop_duplicates().transpose()
docs: A helper function for merging two dataframes that have the same indices, duplicate columns are removed
  
          :param dfs: a list of dataframes to be merged (note: they must have the same indices)
          :type dfs: list[pandas.DataFrame]
          :returns: pandas.DataFrame -- a merged dataframe