RuntimeError:字典在迭代过程中改变了大小-如何解决？

my_dict = {'key1': 'value1', 'key2': 'value2', 'key3': 'value3'}
temp_dict = my_dict.copy()
for key, value in temp_dict.items():
    # 在迭代过程中对字典进行增删操作
    my_dict.pop(key)

my_dict = {'key1': 'value1', 'key2': 'value2', 'key3': 'value3'}
keys_to_remove = []
for key, value in my_dict.items():
    # 在迭代过程中判断是否需要删除键
    if some_condition:
        keys_to_remove.append(key)
for key in keys_to_remove:
    del my_dict[key]

my_dict = {'key1': 'value1', 'key2': 'value2', 'key3': 'value3'}
new_dict = {key: value for key, value in my_dict.items() if some_condition}