在字典列表中按键保留副本

[
    {'name': 'Alice', 'age': 25},
    {'name': 'Bob', 'age': 30},
    {'name': 'Charlie', 'age': 35}
]

# 原始字典列表
original_list = [
    {'name': 'Alice', 'age': 25},
    {'name': 'Bob', 'age': 30},
    {'name': 'Charlie', 'age': 35}
]

# 按键保留副本
key_to_keep = 'name'
new_list = [{key_to_keep: item[key_to_keep]} for item in original_list]

print(new_list)

[
    {'name': 'Alice'},
    {'name': 'Bob'},
    {'name': 'Charlie'}
]

# 错误的键名
key_to_keep = 'nam'
new_list = [{key_to_keep: item[key_to_keep]} for item in original_list]

# 正确的键名
key_to_keep = 'name'
new_list = [{key_to_keep: item[key_to_keep]} for item in original_list]

new_list = []
for item in original_list:
    if isinstance(item, dict):
        try:
            new_list.append({key_to_keep: item[key_to_keep]})
        except KeyError:
            print(f"Key '{key_to_keep}' not found in item: {item}")