In this article, we will offer you an answer and method to one of the problems related to your subject, it is “typeerror: can only concatenate str (not “int”) to str”. Let’s begin to explore the key and relevant message below!

Why does this problem happen?

Before find the cause of the problem: typeerror: can only concatenate str (not “int”) to str, we should explore the original of typeError firstly and how it returns the output. Therefore, you will identify the step that you did before you face the error.

What’s a typeError ?

The TypeError happens when you attempt to perform an operation on a variable that isn’t compatible with that operation. For example, let’s consider the simple case of adding two variables.

var1 = 10

var2 = "string"

print(var1 + var2)

It’s obvious that strings and integers cannot be combined. The only way to solve this problem is to use operands that have similar data types.

Traceback (most recent call last):

  File " home/nikhilomkar/Desktop/test.py", line 4, in <module>

    print(var1 + var2)

TypeError: Unsupported operand type(s) for +: 'int' and 'str'

It is possible to only join strings. Let’s take a look at the error we’re experiencing.

string = "Some random text"

int_value = 99

print(string + int_value)

In this case, we’ve taken strings and int_values both of which are the integer type of data. In the process of concatenating these twotypes, TypeError is to throw.

Traceback (most recent call last):

  File " home/nikhilomkar/Desktop/test.py", line 4, in <module>

    print(var1 + var2)

TypeError: can only concatenate str (not "int") to str

When does the “typeerror: can only concatenate str (not “int”)” error occur?

Strings are among the primary data types utilized in programming. They enable computers to use text. For instance, a string can be used to store names of users or email address in the Python program.

Python contains several string methods that are able to be used to alter or manipulate string. These functions are integrated into Python & are therefore ready to be used without installing any libraries.

In Python the values can be concatenated when they are of the identical kind. You can’t concatenate strings with an integer/ a string with an array. If you follow this, you will get a TypeError occurs:

typeerror: can only concatenate str (not "int") to str

Moreover, there are some programming languages, including JavaScript that permit the concatenation of integers and strings. In Python, it isn’t possible to perform this. If you’re trying to integrate a string as well as an integer, you’ll need convert the number to an unicode string before concatenating it into an actual string.

How to fix the “typeerror: can only concatenate str (not “int”) to str” error

Below are some simple and effective methods that we offer to solve the prolem – typeerror: can only concatenate str (not “int”) to str. Choose the best one for your case!

Solution 1: Change the value: gatsby[“quantity_in_stock”] to a string

Firstly, the value of the gatsby[“quantity_in_stock”] is an integer. The TypeError was caused by our attempt to combine the value, which is an integer, into an unicode string.

To solve the issue “Typeerror: can only concatenate str (not “int”) to str”, you can change the value: gatsby[“quantity_in_stock”] to a string, before concatenating it to the other strings. This can be done using this method: str() method that changes an integer into an unicode string as follow:

print("There are " + str(gatsby["quantity_in_stock"]) + " copies of The Great Gatsby in stock.")

Copy the below suggestion for this problem

There are 4 copies of The Great Gatsby in stock.

It prints out the number of copies available for the console. The information is printed using the format below:

“X” is the number of copies available

print("There are " + str(gatsby["quantity_in_stock"]) +

   " copies of The Great Gatsby in stock.")

Solution 2: Add the follwoing command

Do with way by adding the following command:

print("Program for calculating sum")

numbers=[1, 2, 3, 4, 5, 6, 7, 8]

sum=0

for number in numbers:

sum += number

print("Total Sum is: %d" %sum )

Solution 3: Transform the value product[qty_available] to a string

To correct the problem, transforming the value product[qty_available] to a string, before combining with the other strings of the print statement.

product = {
     "item": "iPhone",
     "price": 1599,
     "qty_available": 50
} 

print("We have total " + str(product["qty_available"]) + " quantities of Product " + product["item"])

Output

We have total 50 quantities of Product iPhone

Solution 4: Utilize f-strings or str.format or even %s in string formatting

Utilizing f-strings or str.format or even %s in string formatting could fix this issue. These methods are to string formatting, will convert values into a str type, so that there is no chance of the error being signaled.

print(f"{book_store[0]['name']} {book_store[0]['release_yr']}")

print(f"{book_store[1]['name']} {book_store[1]['release_yr']}")

print('\n{} {}'.format(book_store[0]['name'],book_store[0]['release_yr']))

print('{} {}'.format(book_store[1]['name'],book_store[1]['release_yr']))

print('\n%s %s' %(book_store[0]['name'],book_store[0]['release_yr']))

print('%s %s' %(book_store[1]['name'],book_store[1]['release_yr']))

Conclusion

We guarantee you will figure out a suitable answer to your problems “typeerror: can only concatenate str (not “int”) to str” with the solution we have shown you. You can resolve this issue with ease by following the steps in our blog post. So, please feel free to leave us a comment if you have any questions or concerns. Thanks for reading!

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