How to Fix a Byte-like Object is Required in Python

Here is a way to fix TypeError: a bytes-like object is required, not 'str.' The error occurs while writing a file due to incorrect usage of the file mode. Below, you'll see how to solve this error.

Python Open File in Write Mode

Here's a way to open files in write mode. The "wb" mode's purpose is to write input to a file. If the file does not exist, it creates one.  

After executing it, it throws an error highlighted in red. The file mode causes to error. Below, you'll see how to fix it and the details.

a=open("file1.txt", 'wb')

b=a.write('I am writing data to a file!')

print(b)

Traceback (most recent call last):

 File "main.py", line 2, in <module>

  b=a.write('I am writing data to a file!')

TypeError: a bytes-like object is required, not 'str'

** Process exited - Return Code: 1 **

Press Enter to exit terminal

How to Fix the Error

You can write data to a file in two ways a string or bytes. The mode you have chosen here is "wb." Which means it allows only binary data. You have attempted to write string data. This causes the error.

Way 1:

Chnage the file mode to "W." Then it will run without the error.

a=open("file1.txt", mode="w" )

a.write("I am writing data to a file!")

a=open("file1.txt", mode="r" )

c=a.read()

print(c)

I am writing data to a file!

** Process exited - Return Code: 0 **

Press Enter to exit terminal

Way 2:

Keep the same file mode. And supply binary input. 

a=open("file1.txt", mode="wb" )

a.write(b'I am writing data to a file!')

a=open("file1.txt", mode="r" )

c=a.read()

print(c)

I am writing data to a file!

** Process exited - Return Code: 0 **

Press Enter to exit terminal

The outline is you can fix the error [bytes-like object is required] using the above two methods in Python.

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