python：追加到数据使用json.dumps

Question

I am trying to create JSON file. using json.dumps and success printing. I have a question.

The format I wanted was

channel_info = OrderedDict()
table = OrderedDict()
table2 = OrderedDict()

channel_info["KIND1"] = pkind[2].text
table[ptime[10].text] = pnk[11].text
table[ptime[11].text] = pnk[12].text
channel_info["TABLE1"] = table

channel_info["KIND2"] = pkind[2].text
table2[ptime[10].text] = pnk[11].text
table2[ptime[11].text] = pnk[12].text
channel_info["TABLE2"] = table2

result:

{
"KIND1": "xxxx",
"TABLE1": {
    "09:10": "aaaa",
    "10:10": "bbbb"
},
"KIND2": "yyyy",
"TABLE2": {
    "09:10": "cccc",
    "10:10": "dddd"
}

}

How to output the same format using a while loop? The names of the JSON objects? KIND1, TABLE1, KIND2, TABLE2 and so on ... I wonder how you can change these names dynamically using a while loop. thank you.

Answer 1

You could do something like this (assuming table dictionary is static over each loop, as it seems in the example you give):

channel_info = dict()
# n_tables is the number of iterations you need
for i in range(n_tables):
    table = dict()
    channel_info["KIND%s" % (i+1)] = pkind[1].text
    table[ptime[10].text] = pnk[11].text
    table[ptime[11].text] = pnk[12].text
    channel_info["TABLE%s" % (i+1)] = table

You don't need the table name dynamically since you assign it to a dictionary key.

Answer 2

Basically, if I understood your question right:

...
i=0
no_of_tables = 4 
while i<=no_of_tables:
  table_counter = i+1
  table_counter = str(table_counter)
  kind = 'KIND' + table_counter
  table = 'TABLE' + table_counter
  channel_info[kind] = pkind[2].text
  table[ptime[10].text] = pnk[11].text
  table[ptime[11].text] = pnk[12].text
  channel_info[table] = table

Note: I know it can be optimized, but for the sake of simplicity I left it as is.