如何從字符串中刪除所有尾部破折號？

Question

實施例：

string1 = 'title--' 
string2 = 'title-' 
string3 = 'this-is-a-title----' 

>> print doSomething(string1) 
>> title 

>> print doSomething(string2) 
>> title 

>> print doSomething(string3) 
>> this-is-a-title 

Answer 1

string1.rstrip("-") 
# "title" 
string2.rstrip("-") 
# "title" 
string3.rstrip("-") 
# "title-is-a-title"