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UPPERCASE_LETTERS = ["A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K",
"L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z"]
LOWERCASE_LETTERS = ["a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k",
"l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z"]
def to_uppercase(letter: str) -> str:
if letter in LOWERCASE_LETTERS:
# swap it out for the uppercase version
idx: int = LOWERCASE_LETTERS.index(letter)
upper_version: str = UPPERCASE_LETTERS[idx]
return upper_version
return letter
def uppercase(word: str) -> str:
"""
Returns a new version of `word` where every letter is uppercased.
Args:
word (str): The string to uppercase
Returns:
str: The uppercased version of `word`
"""
...
def ask_for_choice(prompt: str, valid_choices: list[str]) -> str | None:
"""
Repeatedly prompts the user asking them to make a choice that is
a member of `valid_choices`.
Args:
prompt (str): The prompt to give the user
valid_choices (list[str]): A list of valid choices
Returns:
str: The choice the user inputed
"""
...
def is_answer(s: str | None, yn: set[str]) -> bool:
"""
Returns True when `s` is a member of `yn` and False otherwise
Args:
s(str | None): The string to test
yn(set): A set of potential valid answers
Returns:
bool: True iff `s` in `yn`
"""
...
def prompt_yes_no(prompt: str) -> bool:
"""
Repeatedly prompts the user with prompt until they respond with
an answer starting with y or n.
Args:
prompt (str): The prompt to give to the user
Returns:
bool: Returns True when the user eventually inputs y and False when they input n.
"""
...