ex16.py

from sys import argv
script, filename = argv

print(f'Now we\'ll gonna to erase {filename} file')
print("If you don't want that, hit CTRL-C (^C).")
print("If you do want that, hit RETURN.")
input('? > ')

print("Opening the file...")
target = open(filename, 'w')

print("Truncating the file.  Goodbye!")
target.truncate()

print("Now I'm going to ask you for three lines.")

line1 = input('line 1: ')
line2 = input('line 2: ')
line3 = input('line 3: ')

print("I'm going to write these to the file.")

target.write(line1)
target.write('\n')
target.write(line2)
target.write('\n')
target.write(line3)

print("And finally, we close it.")
target.close()

filename2 = input('Please type file name to open: > ')
filetoopen = open(filename2)
print('And thats is new file that you changed below')
print(filetoopen.read())
print(f'And now i will close the {filename2}')
filetoopen.close()