Question

我正在尝试接受用户输入，并检查它是否在词典中。希望用户输入字符串，浮点数和整数，但是只有字符串才能正确比较。

搜索“ 5”返回有效，但是10或15.0都不起作用，因为将输入转换为字符串。

除了执行检查以强制用户指定他们要搜索的数据类型之外，还有没有办法做到这一点？

new_dict = {'a': '5', 'b':10, 'c':15.0}
do_something = False
search_term = input('enter term: ')
print(search_term)
print(type(search_term))
for k,v in new_dict.items():
    print(v)
    if v == search_term:
        do_something = True
        print ('yes')

print(do_something)

提前谢谢！

Answer 1

您可以做类似的事情：

new_dict = {'a': '5', 'b':10, 'c':15.0}
do_something = False
search_term = input('enter term: ')
for k,v in new_dict.items():
    if v == int(search_term):
        do_something = True
        print("yes")
    elif v == str(search_term):
        do_something = True
        print ('yes')

Answer 2

只需将要比较的两个变量都转换为字符串：

new_dict = {'a': '5', 'b':10, 'c':15.0}
do_something = False
search_term = input('enter term: ')
for k,v in new_dict.items():
    if str(v) == str(search_term):
        do_something = True
        print ('yes')

print(do_something)

另一种解决方案：

new_dict = {'a': '5', 'b':10, 'c':15.0}
do_something = False
search_term = input('enter term: ')
for k,v in new_dict.items():
    try:
        search_term = float(search_term)
        v = float(v)
    except:
        pass
    if v == search_term:
        do_something = True
        print ('yes')

print(do_something)

Answer 3

用if v == search_term:代替if repr(v) == search_term:可以，它可以在'5'上作为输入，但不能在"5"上作为输入。

使用用户输入来搜索各种数据类型的词典？

3 个答案: