Print nth in Python

Print the nth character of a file. You must ask the user for a file name and a value for n. You can assume that the file is in the current directory. You can assume that a valid value for n is given, and that indexing starts at 0.

Console:

Please enter a filename:

input_file.txt

Please enter an index:

25

The character at index 25 is:

t

input_file.txt

Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.