Table of dictionaries

我有一个dicts表，看起来像：

[{
'variant_id': 4126274, 
'stock': [
{'stock_id': 6, 'quantity': 86}, 
{'stock_id': 4, 'quantity': 23}, 
{'stock_id': 3, 'quantity': 9}
]
}, ...]

我的目标是把每一块股票都解压缩成这样：

[{'variant_id': 4126274, 'stock_id': 6, 'quantity':86}
{'variant_id': 4126274, 'stock_id': 4, 'quantity':23}
{'variant_id': 4126274, 'stock_id': 3, 'quantity':9}...]

有什么快速和最佳的方法可以做到这一点吗？

您可以执行以下操作：

result = [{'variant_id': entry['variant_id'],
'stock_id': stock_entry['stock_id'],
'quantity': stock_entry['quantity']} for entry in table for stock_entry in entry['stock']]

这提供

[{'quantity': 86, 'stock_id': 6, 'variant_id': 4126274},
{'quantity': 23, 'stock_id': 4, 'variant_id': 4126274},
{'quantity': 9, 'stock_id': 3, 'variant_id': 4126274}]

这里有两种方法：一种是嵌套for循环，另一种是列表理解。

data = [{'variant_id': 4126274, 'stock': [{'stock_id': 6, 'quantity': 86}, {'stock_id': 4, 'quantity': 23}, {'stock_id': 3, 'quantity': 9}]}]
result = []
for entry in data:
for stock in entry['stock']:
result.append({'variant_id': entry['variant_id'], 'stock_id': stock['stock_id'], 'quantity': stock['quantity']}) 
print(result)
result_list_comprehension = [{'variant_id': entry['variant_id'], 'stock_id': stock['stock_id'], 'quantity': stock['quantity']} for entry in data for stock in entry['stock']]
print(result_list_comprehension)

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