Generate CSV files with all permutations of common line endings

generate-newline-csvs.py

# -*- coding: utf-8 -*-
from __future__ import print_function, unicode_literals
from itertools import product
import sys

try:
    encoding = sys.argv[1]
except IndexError:
    encoding = 'utf-8'

newlines = {
    '\n': 'LF',
    '\r': 'CR',
    '\r\n': 'CR+LF',
}

for outer, inner in product(newlines.keys(), repeat=2):
    description = inner.join([
        '* This',
        '* Is',
        '* An',
        '* Example',
    ])
    data = outer.join([
        'id,sku,description',
        '100,AAAA,"{}"'.format(description),
        '101,AAAB,🎅',
        '102,AAAC,EOF',
    ])
    # write binary to avoid any newline translation
    with open('{}_{}.csv'.format(newlines[outer], newlines[inner]), 'wb') as fp:
        fp.write(data.encode(encoding))