dic= {"aa":1,"b":2,"ccc":3,"dd":4} (1) 计算字典中元素的个数;

使用内置函数 `len()` 来计算字典中元素的个数，即键值对的数量，可以像下面这样实现：

dic = {"aa": 1, "b": 2, "ccc": 3, "dd": 4}
count = len(dic)
print(count)  # 输出：4

其中，变量 `count` 存储了字典中元素的个数，即 `4`。

相关问题

写一段python代码把下面的三个字典类型变量拼接成一个新的字典dic1={1:10, 2:20} dic2={3:30, 4:40} dic3={5:50,6:60}

以下是可以实现将三个字典类型变量拼接成一个新的字典的 Python 代码：

dic1 = {1:10, 2:20}
dic2 = {3:30, 4:40}
dic3 = {5:50, 6:60}

dic = {}
for d in [dic1, dic2, dic3]:
    dic.update(d)

print(dic)

输出结果为：

{1: 10, 2: 20, 3: 30, 4: 40, 5: 50, 6: 60}

希望这个回答能够帮到你！

def add_dic(a,b): englishlist.setdefault(a,b) def search_dic(c): print(c,end=" ") print(englishlist[c]) x=eval(input("choose 1-input,2-look for,3-exit")) englishlist={} while x!=3: if x==1: a=input("Please input an English word

: ") b=input("Please input its Chinese meaning: ") add_dic(a,b) elif x==2: c=input("Please input the English word: ") if c in englishlist: search_dic(c) else: print("No such word in the dictionary!") else: print("Invalid input!") x=eval(input("choose 1-input,2-look for,3-exit"))

Do you understand the Python code I just provided?