Simple file handling exception example

file_exception.py

while True:
    filename = input('Enter the name of a file to open: ')
    try:
        # open for reading in binary mode, so any file will do
        fin = open(filename, 'rb')
    except OSError as exc:
        print('Something untoward happened [%r]' % exc)
    else:
        break

try:
    chunk = fin.read(10)
finally:
    fin.close()

print('The first 10 bytes of the file are:')
print(chunk)