Code shortening.

ex1orig.py

from sys import argv
from os.path import exists

script, from_file, to_file = argv

print(f"Copying from {from_file} to {to_file}")

in_file = open(from_file)
indata - in_file.read()

print(f"The input file is {len(indata)} bytes long")

print(f"Does the output file exist? {exists(to_file)}")
print("Ready, hit RETURN to continue, CTRL-C to abort.")
input()

out_file = open(to_file, 'w')
out_file.write(indata)

print("alright, all done.")

out_file.close()
in_file.close()

myex17.py

from sys import argv
from os.path import exists

script, from_file, to_file = argv

print(f"This file is {len(from_file)} bytes long")
print(f"Does the output file exist? {exists(to_file)}")
input("Press enter to write file.")
#you need the variable in order to use the write command
#you cannot run commands inside the write function
#open it in a variable first then you can write it.
f = open(from_file).read()
open(to_file, 'w').write(f)

haha yeah, I didn't revise it with my latest script. Good catch again.

it just clicked though. it has to be a string in the write() function, so I had to create a variable that would open the file so it can be read from to write into the to_file.

It was a bit weird... but then it clicked.