"Sucks to your assmar" -- William Golding

Write a Python program named piggy.py that takes one or more file names as positional arguments and converts all the words in them into "Pig Latin" (see rules below). Write the output to a directory given with the flags -o|--outdir (default out-yay) using the same basename as the input file, e.g., input/foo.txt would be written to out-yay/foo.txt.

If an argument names a non-existent file, print a warning to STDERR and skip that file. If the output directory does not exist, create it.

To create "Pig Latin":

1. If the word begins with consonants, e.g., "k" or "ch", move them to the end of the word and append "ay" so that "mouse" becomes "ouse-may" and "chair" becomes "air-chay."
2. If the word begins with a vowel, simple append "-yay" to the end, so "apple" is "apple-yay."

The program should print a usage if given no arguments or the -h|--help flag:

$ ./piggy.py
usage: piggy.py [-h] [-o str] FILE [FILE ...]
piggy.py: error: the following arguments are required: FILE
[cholla@~/work/python/playful_python/piggie]$ ./piggy.py -h
usage: piggy.py [-h] [-o str] FILE [FILE ...]

Convert to Pig Latin

positional arguments:
  FILE                  Input file(s)

optional arguments:
  -h, --help            show this help message and exit
  -o str, --outdir str  Output directory (default: out-yay)

If given a bad input file, it should complain and indicate an error:

$ ./piggy.py lkdflk
usage: piggy.py [-h] [-o str] FILE [FILE ...]
piggy.py: error: argument FILE: can't open 'lkdflk': [Errno 2] \
No such file or directory: 'lkdflk'

For each file, write a new output file into the --outdir:

$ ./piggy.py ../inputs/sonnet-29.txt
  1: sonnet-29.txt
Done, wrote 1 file to "out-yay".
$ head -6 out-yay/sonnet-29.txt
onnet-Say 29
illiam-Way akespeare-Shay

en-Whay, in-yay isgrace-day ith-way ortune-fay and-yay en-may’s-yay eyes-yay,
I-yay all-yay alone-yay eweep-bay my-yay outcast-yay ate-stay,
And-yay ouble-tray eaf-day eaven-hay ith-way my-yay ootless-bay ies-cray,
$ ./piggy.py ../inputs/s*.txt
  1: scarlet.txt
  2: sonnet-29.txt
  3: spiders.txt
Done, wrote 3 files to "out-yay".

Hints:

• For the file argument, use type=argparse.FileType('r')
• First write a function that will create a Pig Latin version of just one word; write tests to verify that it does the right thing with words starting with vowels and with consonants
• Write a loop that prints the names of each input file
• Then write a loop inside that to read and print each line from a file
• Then figure out how to print each word on the line
• Then figure out how to print the Pig Latin version of each word on the line