在Python中删除包含子字符串的字典中的值

def remove_values_containing_substring(dictionary, substring):
    keys_to_remove = []
    for key, value in dictionary.items():
        if substring in value:
            keys_to_remove.append(key)
    for key in keys_to_remove:
        del dictionary[key]

# 示例用法
my_dict = {
    "key1": "value1",
    "key2": "value2",
    "key3": "value3",
    "key4": "value4"
}

substring = "sub"

remove_values_containing_substring(my_dict, substring)

print(my_dict)

{'key1': 'value1', 'key3': 'value3'}