code: def calculate_columns(sequence):
      
      columns = {}
  
      for row in sequence:
          for key in row.keys():
              if key not in columns:
                  columns[key] = len(key)
  
              value_length = len(str(row[key]))
              if value_length > columns[key]:
                  columns[key] = value_length
  
      return columns
docs: Find all row names and the maximum column widths.
  
      Args:
          columns (dict): the keys are the column name and the value the max length.
  
      Returns:
          dict: column names (key) and widths (value).