把my_dict里面的"City"变成"Location" my_dict = { "Name": "CUHKSZ", "School": 'SME', "Years": 4, "City": "Shenzhen" }

如果你想在`my_dict`中将键"City"替换为"Location"，你可以使用字典的`update()`方法或直接创建一个新的字典然后合并。这里有两个简单的方法：

方法一：使用`update()`

new_key = "Location"
my_dict.update({old_key: my_dict[old_key] for old_key in ("City",) if old_key in my_dict})

方法二：创建新字典

new_dict = dict()
for key, value in my_dict.items():
    if key == "City":
        new_key = "Location"
    else:
        new_key = key
    new_dict[new_key] = value

my_dict = new_dict

在这两种情况下，`my_dict`都会变为：

{
    "Name": "CUHKSZ",
    "School": "SME",
    "Years": 4,
    "Location": "Shenzhen"
}

相关问题

删除my_dict = { "Name": "CUHKSZ", "School": 'SME', "Years": 4, "City": "Shenzhen" } 里的keys：[“Name", "City"]

你可以使用Python的`del`关键字或`pop()`函数来删除字典`my_dict`中的特定键。如果你想删除多个键，可以列出它们并用`del`：

my_dict = {"Name": "CUHKSZ", "School": 'SME', "Years": 4, "City": "Shenzhen"}

# 删除指定键
to_remove = ["Name", "City"]
for key in to_remove:
    del my_dict[key]

# 或者使用 pop() 函数，这会返回被删除的值（如果存在），但不改变原字典
# for key in to_remove:
#     my_dict.pop(key)

print(my_dict)

运行这段代码后，`my_dict`就只会剩下 "School": 'SME' 和 "Years": 4 这两个键了。

my_dict = {"name": "li", "age": 25}my_str = dict(eval(my_dict))print(my_str)

This code will not run successfully as it will raise a TypeError. The reason is that the "eval()" function expects a string as its argument, but "my_dict" is already a dictionary. Therefore, using "eval()" is unnecessary and incorrect in this case.

If you want to convert the dictionary "my_dict" to a string, you can use the "str()" function:

my_dict = {"name": "li", "age": 25}
my_str = str(my_dict)
print(my_str)

This will output:

{'name': 'li', 'age': 25}