如何向用户询问字典中的键，如果它在字典中，则显示值

Question

当用户输入键（整数）时如何在字典中显示键（整数）string = input("Please enter a name> ")def enumerate_string(string):  s = {}  for i,letter in enumerate(string):     s[i] = letterx = enumerate_string(string)string2 = input("enter several integers separated by a comma ")string3 = string2.split(',')if string3 in set(x):   print(x[string3])

Answer 1

我正在更新您的部分代码：

string2 = input("enter several integers separated by a comma ") # 0,1,2

string3 = string2.split(',') # string3 is a list of numbers but as strings

# ['0','1','2']

string3=[int(num) for num in string3] # [0,1,2]

for num in string3:

   print(x.get(num))# will return the value corresponding to the key

Answer 2

使用这段代码，简单地做同样的事情，但在最后做一个循环，并return在函数中有一个：

string = input("Please enter a name> ")

def enumerate_string(string):

    s = {}

    for i,letter in enumerate(string):

        s[i] = letter

    return s

x = enumerate_string(string)

string2 = input("enter several integers separated by a comma ")

string3 = string2.split(',')

for i in string3:

    if int(i) in x:

        print(x[int(i)])

示例输出：

Please enter a name> John Doe

enter several integers separated by a comma 0,1,2

J

o

h