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Kenil Vasani
Kenil Vasani

Kenil Vasani

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Asked: 2020-12-11T20:36:22+00:00 In:

How to resolve TypeError: can only concatenate str (not “int”) to str

  • 8
  • I decided to make some kind of secret code for testing purposes with Unicode.
  • I’ve done that by adding numbers to Unicode so it would be kind of secret.
  • I’ve been getting this error, but I don’t know how to solve it.
    • Is there any solution?

Original Code

message = input("Enter a message you want to be revealed: ")
secret_string = ""
for char in message:
    secret_string += str(chr(char + 7429146))
print("Revealed", secret_string)
q = input("")

Original Error

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-182-49ece294a581> in <module>
      2 secret_string = ""
      3 for char in message:
----> 4     secret_string += str(chr(char + 7429146))
      5 print("Revealed", secret_string)
      6 q = input("")

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

Updated code

while True:
    try:
        message = int(input("Enter a message you want to be decrypt: "))
        break
    except ValueError:
        print("Error, it must be an integer")
secret_string = ""
for char in message:
    secret_string += chr(ord(char - str(742146)))
print("Decrypted", secret_string)
q = input("")
pythonunicode
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    1 Answer

    1. Rohit Patel

      Rohit Patel

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      Best Answer

      Python working a bit differently to JavaScript for example, the value you are concatenating needs to be same type, both int or str…

      So for example the code below throw an error:

      print( "Alireza" + 1980)

      like this:

      Traceback (most recent call last):
  File "<pyshell#12>", line 1, in <module>
    print( "Alireza" + 1980)
TypeError: can only concatenate str (not "int") to str

      To solve the issue, just add str to your number or value like:

      print( "Alireza" + str(1980))

      And the result as:

      Alireza1980
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