cannot concatenate 'str' and 'list' objects

The error message "cannot concatenate 'str' and 'list' objects" occurs when you try to combine a string and a list using the concatenation operator (+). In Python, you can only concatenate objects of the same type.

To fix this error, you need to convert the list object to a string before concatenating it with the string object. There are a few ways to do this depending on what you want the final result to be.

If you want to concatenate the elements of the list into a single string, you can use the `join()` method. Here's an example:

my_list = ['Hello', 'World']
my_string = ' '.join(my_list)
print(my_string)

Output:

Hello World

If you want to concatenate the string and the list as separate entities, you can convert the list to a string using the `str()` function. Here's an example:

my_list = ['Hello', 'World']
my_string = 'This is a string: ' + str(my_list)
print(my_string)

Output:

This is a string: ['Hello', 'World']

Remember that the appropriate solution depends on your specific use case.