如何才能跳过字典中for循环中迭代而不出现错误，因为字典改变了大小

original_dict = {'a': 1, 'b': 2, 'c': 3}

for key in list(original_dict):  # 使用list()创建键的副本
    if key == 'b':
        del original_dict[key]  # 在原始字典上进行删除操作

print(original_dict)  # 输出: {'a': 1, 'c': 3}

original_dict = {'a': 1, 'b': 2, 'c': 3}

new_dict = {key: value for key, value in original_dict.items() if key != 'b'}

print(new_dict)  # 输出: {'a': 1, 'c': 3}

original_dict = {'a': 1, 'b': 2, 'c': 3}

while original_dict:
    key, value = original_dict.popitem()
    if key == 'b':
        continue  # 跳过特定的键
    print(key, value)

print(original_dict)  # 输出: {}

from collections import defaultdict

original_dict = {'a': 1, 'b': 2, 'c': 3}
new_dict = defaultdict(int)

for key in original_dict:
    if key == 'b':
        continue  # 跳过特定的键
    new_dict[key] = original_dict[key]

print(dict(new_dict))  # 输出: {'a': 1, 'c': 3}