String.Tasks

Hasli4

Jun 15th, 2025

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# 1. Гласные и согласные
def count_vowels_consonants(s):
s = s.lower()
vowels = set("аеёиоуыэюя")
consonants = set("бвгджзйклмнпрстфхцчшщ")
v_count = sum(1 for ch in s if ch in vowels)
c_count = sum(1 for ch in s if ch in consonants)
print("Гласных:", v_count, "Согласных:", c_count)
# 2. Имя из e‑mail
def extract_username(email):
if "@" not in email:
print("Ошибка: нет символа @")
else:
print(email.split("@", 1)[0])
# 3. Нормализация пробелов
def normalize_spaces(s):
parts = s.split()
result = " ".join(parts)
print(result)
# 4. Палиндром
import re
def is_palindrome(phrase):
cleaned = re.sub(r'[^A-Za-zА-Яа-я0-9]', '', phrase).lower()
print(cleaned == cleaned[::-1])
# 5. Шифр Цезаря (русский алфавит)
def caesar_rus(text, k):
alpha = "абвгдеёжзийклмнопрстуфхцчшщъыьэюя"
def shift(ch):
lower = ch.lower()
if lower in alpha:
i = alpha.index(lower)
new = alpha[(i + k) % len(alpha)]
return new.upper() if ch.isupper() else new
return ch
print("".join(shift(ch) for ch in text))
# 6. Проверка пароля
def check_password(pwd):
ok = True
if len(pwd) < 8:
print("Пароль слишком короткий")
ok = False
if not any(ch.isdigit() for ch in pwd):
print("Нет цифр")
ok = False
if not any(ch.islower() for ch in pwd):
print("Нет строчных букв")
ok = False
if not any(ch.isupper() for ch in pwd):
print("Нет заглавных букв")
ok = False
if ok:
print("Пароль надёжен")
# 7. Формат даты
def reformat_date(dt):
parts = dt.split(".")
if len(parts) != 3 or not all(p.isdigit() for p in parts):
print("Некорректный ввод")
else:
d, m, y = parts
if len(d)==2 and len(m)==2 and len(y)==4:
print(f"{y}-{m}-{d}")
else:
print("Некорректный ввод")
# 8. Аббревиатура ФИО
def abbrev_fio(fio):
parts = fio.split()
if len(parts)==3:
last, first, patron = parts
print(f"{last} {first[0]}.{patron[0]}.")
else:
print("Неверный формат ФИО")
# 9. Частотный анализ
import string
def top3_words(text):
text = text.lower()
for p in string.punctuation:
text = text.replace(p, " ")
words = [w for w in text.split() if w]
from collections import Counter
cnt = Counter(words)
for word, _ in cnt.most_common(3):
print(word)
# 10. Парсер параметров URL
def parse_url_params(url):
if "?" not in url:
print("Нет параметров")
return
qs = url.split("?",1)[1]
pairs = qs.split("&")
for pair in pairs:
if "=" in pair:
k, v = pair.split("=",1)
print(f"{k}:{v}")
else:
print(f"{pair}:")

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