Erases a specified file.

eraser.py

import sys
import os.path

# get file to erase
fn = input("file to erase: ")

# open file'
try:
    # check if it exists
    if not os.path.exists(fn):
        raise IOError("file " + fn + " does not exist")

    # confirmation
    confirm = input("type y to confirm erasure of file. this is irreversible: ")
    if (confirm != 'y'):
        sys.exit(0)

    # open stream, write and close
    f = open(fn, 'w+')
    f.write("")
    f.close()
except OSError as e:
    print("error while opening file or writing to file: " + str(e))
    sys.exit(1)

# done
print("successfully erased file " + fn)