Implement C's Switch in Python 3

[MRAB]

On 2019-02-06 00:25, John Sanders wrote:
> On Saturday, February 2, 2019 at 6:47:49 PM UTC-6, Sayth Renshaw wrote:
>> Hi
>> 
>> I am trying to convert a switch statement from C into Python. (why? practising).
>> 
>> This is the C code. 
>> 
>> printf("Dated this %d", day);
>>   switch (day) {
>>     case 1: case 21: case 31:
>>         printf("st"); break;
>>     case 2: case 22:
>>         printf("nd"); break;
>>     case 3: case 23:
>>         printf("rd"); break;
>>     default: printf("th"); break;
>>     
>>   }
>>   printf(" day of ");
>> 
>> #Premise if the use enter an int as the date 21 for example it would print 21st. It appends the correct suffix onto a date.
>> 
>> Reading and trying to implement a function that uses a dictionary. Not sure how to supply list into it to keep it brief and with default case of 'th'.
>> 
>> This is my current code.
>> 
>> def f(x):
>>     return {
>>         [1, 21, 31]: "st",
>>         [2, 22]: "nd",
>>         [3, 23]: "rd",
>>     }.get(x, "th")
>> 
>> 
>> print(f(21))
>> 
>> I have an unhashable type list. Whats the best way to go?
>> 
>> Cheers
>> 
>> Sayth
> 
> My best, readable attempt good for 1 - 99:
> 
> def sufx( day ):
>      if (day % 10) in [0,4,5,6,7,8,9] or (day / 10) == 1:
>          return 'th'
>      return {1: 'st', 2: 'nd', 3: 'rd'}[day % 10]
> 
In Python 3, 11/10 == 1.1, not 1.