正确更新动态python字典的正确方法

Question

I have a python dict containing data about a table.

table_dict = {'0': {'column_metadata': '...',
                    'cells':[[cell1_url],[cell2_url]]
                   },
              '1': {'column_metadata': '...',
                    'cells':[[cell1_url],[cell2_url]]
                   }
             }

Here keys are column position ie 0 means first column, 1 is second so on each column has a inner dict with a key cells which is list of list.

I am iterating over this dict to get cell value from url and then appending it back to same list.

for key, column in table_dict:
    for cell in column['cells']:
        cell_value = get_cell_data(cell1_url)
        column['cells'].append(cell_value)

with this code I get final dict as

table_dict = {'0': {'column_metadata': '...',
                    'cells':[[cell1_url, cell1_data],
                             [cell2_url, cell2_data]
                            ]
                   },
              '1': {'column_metadata': '...',
                    'cells':[[cell1_url, cell1_data],
                             [cell2_url, cell2_data]
                            ]

I will not delete any keys just add data to dict.

Is this the correct method. Iterating over dict and then append to same.

Is there any better way to approach this problem ?

Answer 1

From your description I assume, you does not want to append something to column['cells'] but to the lists inside this list:

for column in table_dict.values():
    for cell in column['cells']:
        cell_url = cell[0]
        cell.append(get_cell_data(cell_url))