input_parser.py
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from emitter import Emitter
from receiver import Receiver
from mirror import Mirror
'''
Name:
SID:
Unikey:
input_parser - A module that parses the inputs of the program.
We define parsing as checking the validity of what has been entered
to determine if it's valid. If it's not valid, an appropriate message
should be printed. Whenever we retrieve input in the program, we
should be using functions from this module to validate it.
You are free to add more functions, as long as you aren't modifying the
existing scaffold.
'''
def parse_size(user_input: str) -> tuple[int, int] | None:
# only requires implementation once you reach GET-MY-INPUTS
'''
Checks if user_input is a valid input for the size of the circuit board by
performing the following checks:
1) user_input contains exactly 2 tokens. If there are 2 tokens, we
interpret the first token as width and the second token as height for
the remaining checks.
2) width is an integer.
3) height is an integer.
4) width is greater than zero.
5) height is greater than zero.
Parameters
----------
user_input - the user input for the circuit's board size
Returns
-------
If all checks pass, returns a tuple containing the width and height of
the circuit board.
Else, if at any point a check fails, prints an error message stating the cause
of the error and returns None, skipping any further checks.
Example 1:
>>> size = parse_size('18 0')
Error: height must be greater than zero
>>> size
None
Example 2:
>>> size = parse_size('18 6')
>>> size
(18, 6)
'''
