Exception handling

0

1

3

def read_and_divide(filename):
    print("before " + filename)
    with open(filename, 'r') as fh:
        number = int(fh.readline())
        print(100 / number)
    print("after  " + filename)

import sys
import module

files = sys.argv[1:]

for filename in files:
    try:
        module.read_and_divide(filename)
    except Exception as err:
        print(f"  There was a problem in '{filename}'", file=sys.stderr)
        print(f"  Text: {err}", file=sys.stderr)
        print(f"  Name: {type(err).__name__}", file=sys.stderr)
    print('')

before one.txt
100.0
after  one.txt

before zero.txt
  There was a problem in 'zero.txt'
  Text: division by zero
  Name: ZeroDivisionError

before two.txt
  There was a problem in 'two.txt'
  Text: [Errno 2] No such file or directory: 'two.txt'
  Name: FileNotFoundError

before three.txt
33.333333333333336
after  three.txt