Sum the last five objects of a JSON-CodePudding

To access JSON I use:

url = f'https:...........'
response = requests.get(url, headers=headers).json()
graphs = response['graphPoints']
for graph in graphs:
    sum_value = graph['value']

This JSON can change size, so the last five "value" I'm trying to sum won't always be in the same position, so I can't specify exactly which position:

In this case, the sum would give the result 31

[
  ...
  {'minute': 87, 'value': 4},
  {'minute': 88, 'value': 4},
  {'minute': 89, 'value': 4},
  {'minute': 90, 'value': 4},
  {'minute': 90.5, 'value': 15}
]

If I wanted to sum all the 92 "value", I could create a list:

List_Of_Values = []
List_Of_Values.append(graph['value'])

But in case I will always only need the last 5 "value", how could I do that?

Remembering that this JSON can contain different sizes, so I can't specify in which position the last 5 will be fixed.

CodePudding user response：

What you need is simple generator expression with a slice:

>>> sum(d["value"] for d in graphs["graphPoints"][-5:])
31