not all arguments converted during string formatting

This error occurs when there are not enough arguments passed to the string formatting operator (% or .format() method) to replace all the placeholders in the string. For example, if the string contains three placeholders but only two arguments are passed, the error will be raised.

To solve this error, ensure that the number of arguments passed matches the number of placeholders in the string. You can also use named placeholders or keyword arguments to ensure that the arguments are correctly mapped to the placeholders in the string.

Here is an example of how to use named placeholders:

name = 'John'
age = 30
print("My name is {name} and I am {age} years old.".format(name=name, age=age))

This will output: "My name is John and I am 30 years old."