字典列表中特定键的值之和

def sum_of_values(dictionaries, key):
    total = 0
    for dictionary in dictionaries:
        if key in dictionary:
            total += dictionary[key]
    return total

dictionaries = [
    {"name": "John", "age": 28, "salary": 5000},
    {"name": "Sarah", "age": 32, "salary": 7000},
    {"name": "Michael", "age": 45, "salary": 6000}
]

key = "salary"
result = sum_of_values(dictionaries, key)
print(f"The sum of values for key '{key}' is: {result}")

The sum of values for key 'salary' is: 18000