I am new to programming and in this code there is an error I don't understand

Question

The error says: "TypeError: unsupported operand type(s) for Add: 'int' and 'str' on line 39". What does this mean and how do i fix this? Here is the code:

import time
TimeIsUp=0
print ("Timer")
h=int(input("Hours-"))
m=int(input("Minutes-"))
if m>59:
 while m>0 and m!=0:
  m-=60
  h+=1
 m+=60
 h-=1
s=int(input("Seconds-"))
if s>59:
 while s>0 and s!=0:
  s-=60
  m+=1
 s+=60
 m-=1
 while m>=0 and m!=0:
  m-=60
  h+=1
 m+=60
 h-=1
while TimeIsUp==0:
 s-=1
 if s<0 and m>0:
  s+=61
  m-=1
  if m<0 and h>0:
   m+=61
   h-=1
 else:
  if h>0:
   s+=61
   m+=59
   h-=1
  else:
   TimeIsUp==1
 print (h+":"+m+":"+s)
 time.sleep(1)
print ("Time's Up!")

The "time" import if from https://trinket.io/python (Because that is what im using to code Phython as a beginner).

Answer 1

TypeError: unsupported operand type(s) for Add: 'int' and 'str' on line 39". What does this mean

It means that on line #39 of your code, you're trying to add (the '+' operator) an integer and an string - which doesn't make sense. Reading your code, this is obviously this line:

 print h+":"+m+":"+s

Note that strings implement the '+' operator as string concatenation, while ints implement it as (of course) addition.

and how do i fix this?"

You could turn your ints into strings as mentionned in other comments or answers, but the proper solution here is to use string formatting operations:

print "{}:{}:{}".format(h, m, s)

or if you want to be more explicit

print "{hour}:{minutes}:{seconds}".format(hour=h, minutes=m, seconds=s)

str.format() will take care of necessary conversions etc, and also provides more advanced formatting operations (leading zeros for numerics etc).

Answer 2

You just need to cast you integer values inside the print function. The reason is that the print function requires a string and Python does not auto-cast integers when are concatenated with strings:

print str(h) + ":" + str(m) + ":" + str(s)

Answer 3

This seems the problem:

print h+":"+m+":"+s

Cant concat string with int unless wrapping ints with str() or one of the options in this post

Check https://www.journaldev.com/23642/python-concatenate-string-and-int

Answer 4

The error line is here:

print h+":"+m+":"+s, use str() to convert it

Answer 5

It is very hard to keep track on the code without the full traceback and the actual line numbers, we just can't know for sure what you planned to do.

Anyway:

It's seems to be that the problem is in this line:

print h+":"+m+":"+s

Quick fix is to change this line of code to:

`print str(h)+":"+str(m)+":"+str(s)'

In that way, you convert the variable from int back to string.

And if you are using Python 3:

print(str(h)+":"+str(m)+":"+str(s))

By the way, Python provides us a better way of doing this staff without using converts/casts.

You should use format probably most of the times:

print("{hour}:{minutes}:{seconds}".format(hour=h, minutes=m, seconds=s)

You can read more about string formatting here.

Thank you @bruno desthuilliers for clarifying it.

Answer 6

Basically to got a data type error. To concat a string you need to make all the datatypes match. The variables h, m and s are currently integers so you can use the str() function to convert them to. string.