Python:如何从未知数量的字段中反向获取匹配的字段编号

fields = {
    'name': 1,
    'age': 2,
    'gender': 3,
    'address': 4
}

def get_field_number(fields, match_field):
    for field, number in fields.items():
        if field == match_field:
            return number
    return -1

fields = {
    'name': 1,
    'age': 2,
    'gender': 3,
    'address': 4
}

match_field = 'age'
field_number = get_field_number(fields, match_field)
print(f"The field number of '{match_field}' is {field_number}")

The field number of 'age' is 2