Question

我正在从 csv 读取 API 输入，下面是我得到的列表

[{'name': 'john', 'loan_info': [{'amount': '9000', 'rate': 12.2}]}]

在上面的列表中，我想更改顺序，即

[{'loan_info': [{'amount': '9000', 'rate': 12.2}],'name': 'john'}]

任何人都可以在这里提供帮助，在此先感谢

Answer 1

您尝试做的是不是更改列表顺序，而是更改字典顺序：

Trying to swap these two, elements of a dictionary.
     |                |
[{'name': 'john', 'loan_info': [{'amount': '9000', 'rate': 12.2}]}]
||                             ||__________dictionary__________||||
||                             |______________list______________|||
||___________________________dictionary__________________________||
|_______________________________list______________________________|

字典没有内在顺序，当您添加或删除键时（并且可能在任何时间），顺序可以任意更改。

如果你想以特定的顺序显示它们，你需要明确地这样做，可能会像这样的怪物：

mylist = [{'name': 'john', 'loan_info': [{'amount': '9000', 'rate': 12.2}]}]

print(mylist)
print("\n".join([f"[{{'loan_info': {x['loan_info']}, 'name': '{x['name']}'" for x in mylist]), end="}]\n")

这给了你：

[{'name': 'john', 'loan_info': [{'amount': '9000', 'rate': 12.2}]}]
[{'loan_info': [{'amount': '9000', 'rate': 12.2}], 'name': 'john'}]

但是，考虑到该代码实际上是多么可怕（以及在不炸毁您的头骨的情况下添加字段需要付出多少努力），您可能希望选择更好的漂亮打印解决方案。< /p>

Answer 2

I need to add the dict loan_info at the beginning of the list as I need to pass that in a post request to forming that API payload below is the code 
The main problem is: I am reading some data from a CSV sheet below is my coded

f = pd.read_csv('/testdata.csv',
 dtype={
        "amount": str,
        "rate": float,
        "debt_type": str,
        "country": str
                   })
finalList = []
finalDict = {}
grouped = df.groupby(['name'])
for key, value in grouped:
    dictionary = {}
    j = grouped.get_group(key).reset_index(drop=True)
    dictionary['name'] = j.at[0, 'name']
    dictList = []
    anotherDict = {}
    for i in j.index:
        anotherDict['amount'] = j.at[i, 'amount']
        anotherDict['rate'] = j.at[i, 'rate']
        dictList.append(anotherDict)
        print(dictList)
        dictionary['loan_info'] = dictList        
        finalList.append(dictionary)
        json.dumps(finalList)
        
now the list order I want to achieve is below:
[{'loan_info': [{'amount': '9000', 'rate': 12.2}],'name': 'john'}]

and the current order is
[{'name': 'john', 'loan_info': [{'amount': '9000', 'rate': 12.2}]}]

如何更改列表中节点的顺序

2 个答案: