Python Taskbook Level 7.2
Given a text file, get the number of letters in it (i.e. without spaces, punctuation marks, etc.).
Create a text file named with the current date in the format year-month-day.
The file contains numbers separated by commas. Get the maximum of these numbers.
Given a text file, get a list of all its lines.
Write a program that will generate the following list:
[
['x'],
['x', 'x'],
['x', 'x', 'x'],
['x', 'x', 'x', 'x'],
['x', 'x', 'x', 'x', 'x'],
]
