CODEWITHSUNDEEP
pythonpython-3.x
Volodymyr Levytskyi
Volodymyr Levytskyi

Reputation: 3432

TypeError: Can't convert 'list' object to str implicitly

I have python class:

class Athlete:
    def __init__(self,fullName,dob,times):
        self.fullName = fullName
        self.dob = dob
        self.times = times
    ##  print('times is ',times)

    def __str__(self):
        return ''.join("Athlete[fullName="+self.fullName +",dob="+self.dob+",sortedTimes="+self.sortedTimes+"]")

    def __repr__(self):
        return self.__str__()

Instances of this class are stored in map athleteMap as values.

When I do print(athleteMap) I get this error:

File "D:/Software/ws/python_ws/collections\athleteList.py", line 11, in __str__
    return ''.join("Athlete[fullName="+self.fullName +",dob="+self.dob+",sortedTimes="+self.sortedTimes+"]")
TypeError: Can't convert 'list' object to str implicitly

I need to print Athlete instance in print method.

How to do this in python?

Upvotes: 0

Views: 3587

Answers (2)

BartoszKP
BartoszKP

Reputation: 35891

Your join call doesn't make sense. You probably want something like this:

def __str__(self):
    return "Athlete[fullName="
        + str(self.fullName)
        + ",dob="
        + str(self.dob)
        + ",sortedTimes="
        + str(self.sortedTimes)
        + "]"

I've added str to every attribute because I can't know for sure in which one of them you put a list. The problem is evident from the error - lists can't be converted implicitly to string - you need to mark this conversion explicitly via str() call. One of your attributes (dob or times most probably) is a list.

Upvotes: 1

Martijn Pieters
Martijn Pieters

Reputation: 1122252

Convert times to a string explicitly then:

return "Athlete[fullName=" + self.fullName  + ",dob=" + self.dob + ",sortedTimes=" + str(self.sortedTimes) + ']'

You don't need ''.join() here.

A better option is to use string formatting:

return "Athlete[fullName={0.fullName},dob={0.dob},sortedTimes={0.sortedTimes}]".format(self)

Upvotes: 2

Related Questions