python - 创建一个字典，其值每次使用时都会更新

Question

我想创建一个字典，每次使用时都会更新其键

我尝试过的:

import itertools

changing_dict = {
    "key1": next(change),
    "key2": next(change),
    "key3": next(change),
    "key4": 10010
}

print(changing_dict)
# Output
# {'key1': 100, 'key2': 105, 'key3': 110, 'key4': 10010}

print(changing_dict)
# Output
# {'key1': 100, 'key2': 105, 'key3': 110, 'key4': 10010}

预期输出

print(changing_dict)
# Output
# {'key1': 100, 'key2': 105, 'key3': 110, 'key4': 10010}

print(changing_dict)
# Output
# {'key1': 115, 'key2': 120, 'key3': 125, 'key4': 10010}

有关如何执行此操作的任何帮助，或者这是否可能，因为在创建字典时计算可迭代值。

The actual problem is creating configuration files where every time this dict is used, I get it with new port numbers.

Answer 1

尝试使用这个函数，你可以有一个函数，所以每次运行时，change变量都会不同:

change = iter(range(100, 200, 5)) # just an example

def next_dict():
    changing_dict = {
        "key1": next(change),
        "key2": next(change),
        "key3": next(change),
        "key4": 10010
    }
    return changing_dict
print(next_dict())
print(next_dict())

输出:

{'key1': 100, 'key2': 105, 'key3': 110, 'key4': 10010}
{'key1': 115, 'key2': 120, 'key3': 125, 'key4': 10010}