a = [
    {'main_color': 'red', 'second_color':'blue'},
    {'main_color': 'yellow', 'second_color':'green'},
    {'main_color': 'yellow', 'second_color':'blue'},
]
 
#括號(hào)中的部分是一個(gè)生成器表達(dá)式，對(duì)于具有您要查找的鍵值對(duì)的每個(gè)字典都返回True，否則返回False。
if not any(d['main_color'] == 'red' for d in a):
    # does not exist
 
#如果鍵也可能缺少上面的代碼可以給你一個(gè)KeyError。你可以通過使用get和提供一個(gè)默認(rèn)值來解決這個(gè)問題。
if not any(d.get('main_color', None) == 'red' for d in a):
    # does not exist

dict_list = [{"name": "小明",
              "qq": "123",
              "age": "18"},
             {"name": "小美",
              "qq": "110",
              "age": "17"}]
name = input("請(qǐng)輸入查找的學(xué)生信息：")

for info in dict_list:
    if name == info["name"]:
        print("存在該學(xué)生")
        break
else:
    print("該學(xué)生不存在")

if name in info.values()

result = filter(lambda x: x["name"] == name, dict_list)
result_list = list(result)
if len(result_list) > 0:
    print("存在")
else:
    print("不存在")'''

result = filter(lambda x: x["name"] == name, dict_list)
result_list = list(result)
print(result_list)