我如何用JSON中先前值的最后一个数字继续新值？

Posted 2021-05-03

这是我的代码：

with open('res.json', 'r') as file1:
    json_data = json.load(file1) 
for g in json_data['groups']:
  try:
   for i, group in enumerate(g['resources']):
     group['slot'] = i 

  except:
      continue


with open("RES_Edited.JSON", 'w') as json_edited:
     json.dump(json_data, json_edited, indent = 1)

它使每个插槽都像插槽：1，插槽：2，插槽：3，那太好了。但是在g ['resources']的下一个子级中，它又像插槽：1，插槽：2，插槽3一样开始。我希望它从上一个子级的最后一个数字继续。如：广告位：4，广告位：5 ...

谢谢！

答案

为什么不在整个代码中使用一个变量，而不是像下面这样的for循环：

with open('res.json', 'r') as file1:
    json_data = json.load(file1) 
i = 1
for g in json_data['groups']:
  try:
   for group in g['resources']:
     group['slot'] = i
     i += 1 

  except:
      continue

with open("RES_Edited.JSON", 'w') as json_edited:
     json.dump(json_data, json_edited, indent = 1)

另一答案

对当前代码的最小更改。只需在循环范围之外添加一个变量，然后使用range而不是enumerate。

current_child = 0

with open('res.json', 'r') as file1:
    json_data = json.load(file1) 
for g in json_data['groups']:
  try:
   for i, group in zip(range(current_child, current_child+len(g['resources'])),g['resources']):
     group['slot'] = i 

  except:
      continue


with open("RES_Edited.JSON", 'w') as json_edited:
     json.dump(json_data, json_edited, indent = 1)