[Python] Match dict values and add a key to the dict if it matchs

I have two lists of dicts.

products = [
{
'offer': {
'name': 'Iphone',
'sku': '1234'
}
},
{
'offer': {
'name': 'Samsung',
'sku': '5678'
}
},
]


prices = [
{
'id': '1234',
'price': {
'value': 500,
'currencyId': 'USD'
}
},
{
'id': '5678',
'price': {
'value': 600,
'currencyId': 'USD'
}
}
]


I have to add prices to products with matching them by fields "sku" and "id". I want to get a new list of dicts

[
{
'offer': {
'name': 'Iphone',
'sku': '1234',
'value': 500,
'currencyId': 'USD'
}
},
{
'offer': {
'name': 'Samsung',
'sku': '5678',
'value': 600,
'currencyId': 'USD'
}
}
]


I tried to do this:

for product, price in zip(products, prices):
if product.get("offer", {}).get("sku", {}) == price.get("id", {}):
product.get("offer", {}).update(price.get("price", {}))


but it doesn't works. It updates only 14 products (in the list of 4000 products) and I can't understand why.

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