python - __repr__ with 2 lists with multiple items in the List -

hopefully quick answer! direction of appreciated. trying prepare final exam.

this how calling class:

    >>> q = priorityqueue()     >>> q.insert("text",10)     >>> q.insert("hello", 18)     >>> q     text 10, hello 18 

so have class like:

    class priorityqueue():            def __init__(self):               self.items = []               self.priorities = []             def insert(self, x, p):               self.items.append(x)               self.priorities.append(p)             #this dont understand how return how should.            def __repr__(self):                new = []                x in range(len(self.items)):                    new.append(str(self.items[x])+ " " +str(self.priorities[x]))                return [str(x) x in new] 

this give me error like:

      typeerror: __repr__ returned non-string (type list) 

thanks stack!

the __repr__ function must return string, you're returning list. maybe want change return line return '\n'.join(new).