a little more advanced user error exceptions

#!/usr/bin/python3

import sys

try:
        f = open('myfile.txt')
        s = f.readline()
        i = int(s.strip())
except IOError as err:
        print("I/O error: {0}".format(err))
except ValueError:
        print("Could not convert data to an integer")
except:
        print("unexpected error",sys.exc_info()[0])
        raise
~