Information, calcul, communication
CS-119(k)
ICC-P Exercices supplémentaires, corrigé
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Code:
from dataclasses import dataclass
# 1
@dataclass
class Contact:
first_name: str
last_name: str
gender: bool
age: int
height: float
# 2
all_contacts = [
Contact("Josh", "Lyman", False, 42, 1.86),
Contact("Toby", "Ziegler", False, 51, 1.78),
Contact("Donna", "Moss", True, 25, 1.72),
Contact("Jed", "Bartlet", False, 56, 1.75),
Contact("Zoey", "Bartlet", True, 19, 1.69),
Contact("Leo", "McGarry", False, 62, 1.77),
Contact("C. J.", "Cregg", True, 43, 1.82),
Contact("Sam", "Seaborn", False, 39, 1.71),
]
# 3
for c in all_contacts:
print(c)
print("--")
# 4
def reverse(contacts: list[Contact]) -> list[Contact]:
reversed: list[Contact] = []
for i in range(len(contacts) - 1, -1, -1):
reversed.append(contacts[i])
return reversed
def reverse2(contacts: list[Contact]) -> list[Contact]:
return contacts[::-1]
for c in reverse(all_contacts):
print(c)
print("--")
# 5
def filter_by_gender(contacts: list[Contact], wanted_gender_as_bool: bool) -> list[Contact]:
filtered: list[Contact] = []
for c in contacts:
if c.gender == wanted_gender_as_bool:
filtered.append(c)
return filtered
def filter_by_gender2(contacts: list[Contact], wanted_gender_as_bool: bool) -> list[Contact]:
return [c for c in contacts if c.gender == wanted_gender_as_bool]
only_women = filter_by_gender(all_contacts, True)
only_men = filter_by_gender(all_contacts, False)
# 6
def calculate_average_age(contacts: list[Contact]) -> float:
sum_age = 0
for c in contacts:
sum_age += c.age
return sum_age / len(contacts)
def calculate_average_age2(contacts: list[Contact]) -> float:
return sum([c.age for c in contacts]) / len(contacts)
print(calculate_average_age(all_contacts))
print(calculate_average_age(only_women))
print(calculate_average_age(only_men))
# 7
def calculate_maximum_height(contacts: list[Contact]) -> float:
max_height = 0.0
for c in contacts:
if c.height > max_height:
max_height = c.height
return max_height
def calculate_maximum_height2(contacts: list[Contact]) -> float:
return max([c.height for c in contacts])
print(calculate_maximum_height(all_contacts))
print(calculate_maximum_height(only_women))
print(calculate_maximum_height(only_men))
# 8
def count_first_names_of_length(l: int, contacts: list[Contact]) -> int:
num = 0
for c in contacts:
if len(c.first_name) == l:
num += 1
return num
for l in 3, 4, 5:
n = count_first_names_of_length(l, all_contacts)
print(f"Il y a {n} contacts avec un prénom de taille {l}")
print("--")
# 9
def gather_first_names_alphabetically(contacts: list[Contact]) -> list[str]:
first_names: set[str] = set()
for c in contacts:
first_names.add(c.first_name)
first_names_as_list = list(first_names)
first_names_as_list.sort()
return first_names_as_list
for fn in gather_first_names_alphabetically(all_contacts):
print(fn)
print("--")
# 10
def build_letter_frequency_dict(contacts: list[Contact]) -> dict[str, int]:
letter_counts: dict[str, int] = {}
for c in contacts:
for name in c.first_name, c.last_name:
for char in name:
char = char.lower()
if char in letter_counts:
letter_counts[char] += 1
else:
letter_counts[char] = 1
return letter_counts
all_letter_counts = build_letter_frequency_dict(all_contacts)
# 11
def find_most_often_used_character(letter_counts: dict[str, int]) -> str:
num_max = 0
char_max = ""
for c, n in letter_counts.items():
if n > num_max:
num_max = n
char_max = c
return char_max
print(find_most_often_used_character(all_letter_counts))
# 12
def group_by_last_name(contacts: list[Contact]) -> dict[str, set[str]]:
groups: dict[str, set[str]] = {}
for c in contacts:
if c.last_name in groups:
groups[c.last_name].add(c.first_name)
else:
groups[c.last_name] = {c.first_name}
return groups
print(group_by_last_name(all_contacts))