Standart kutubxona amaliyoti

from collections import Counter

matn = "python dasturlash tili python bilan ishlash python kuchli"
sozlar = matn.split()

hisoblagich = Counter(sozlar)

print(hisoblagich)
print(hisoblagich["python"])
print(hisoblagich.most_common(3))

from collections import Counter

# Harflar chastotasi
harflar = Counter("dasturlash")
print(harflar.most_common(3))

# Ikki hisoblagichni qo'shish
birinchi_hafta = Counter({"Python": 12, "SQL": 5})
ikkinchi_hafta = Counter({"Python": 8, "Git": 3})
print(birinchi_hafta + ikkinchi_hafta)

from collections import defaultdict

talabalar = [
    ("Toshkent", "Husanboy"),
    ("Namangan", "Sardor"),
    ("Toshkent", "Malika"),
    ("Buxoro", "Bekzod"),
    ("Toshkent", "Nodira"),
]

# Oddiy lug'at bilan
guruhlar = {}
for shahar, ism in talabalar:
    if shahar not in guruhlar:
        guruhlar[shahar] = []
    guruhlar[shahar].append(ism)

# defaultdict bilan - tekshiruv kerak emas
guruhlar = defaultdict(list)
for shahar, ism in talabalar:
    guruhlar[shahar].append(ism)

for shahar, ismlar in guruhlar.items():
    print(f"{shahar:<12}{len(ismlar)} ta: {', '.join(ismlar)}")

from collections import namedtuple
from dataclasses import dataclass, field

# namedtuple - yengil va o'zgarmas
Nuqta = namedtuple("Nuqta", ["x", "y"])
markaz = Nuqta(41.311, 69.240)
print(f"{markaz.x}, {markaz.y}")


# dataclass - zamonaviy va moslashuvchan
@dataclass
class Mahsulot:
    nomi: str
    narxi: int
    soni: int = 1
    teglar: list = field(default_factory=list)

    @property
    def jami(self) -> int:
        return self.narxi * self.soni


klaviatura = Mahsulot("Klaviatura", 185_000, 2, ["aksessuar"])
print(klaviatura)
print(f"Jami: {klaviatura.jami:,} so'm")

from collections import deque

navbat = deque(["Husanboy", "Sardor", "Malika"])

navbat.append("Bekzod")           # oxiriga
navbat.appendleft("Nodira")       # boshiga
print(navbat)

print(navbat.popleft())           # boshidan olish - juda tez
print(navbat.pop())               # oxiridan olish

# Oxirgi N ta elementni saqlash
oxirgi_uch = deque(maxlen=3)
for son in range(1, 8):
    oxirgi_uch.append(son)
print(oxirgi_uch)

import re

matn = """
Aloqa: [email protected], tel: +998901234567
Ofis: [email protected], tel: +998712001020
Sana: 08.09.2026, buyurtma raqami: BUY-4821
"""

# Emaillarni topish
emaillar = re.findall(r"[\w.-]+@[\w.-]+\.\w+", matn)
print("Emaillar:", emaillar)

# Telefon raqamlar
telefonlar = re.findall(r"\+998\d{9}", matn)
print("Telefonlar:", telefonlar)

# Sana
sana = re.search(r"(\d{2})\.(\d{2})\.(\d{4})", matn)
if sana:
    print(f"Sana topildi: kun={sana.group(1)}, oy={sana.group(2)}, yil={sana.group(3)}")

# Almashtirish
maxfiy = re.sub(r"\+998\d{9}", "+998*********", matn)
print(maxfiy.strip().split("\n")[0])

import re


def email_togrimi(email: str) -> bool:
    naqsh = r"^[\w.-]+@[\w-]+\.[a-zA-Z]{2,}$"
    return bool(re.match(naqsh, email))


def telefon_togrimi(telefon: str) -> bool:
    naqsh = r"^\+998\d{9}$"
    return bool(re.match(naqsh, telefon))


def parol_kuchlimi(parol: str) -> tuple:
    talablar = {
        "Kamida 8 ta belgi":  len(parol) >= 8,
        "Katta harf":         bool(re.search(r"[A-Z]", parol)),
        "Kichik harf":        bool(re.search(r"[a-z]", parol)),
        "Raqam":              bool(re.search(r"\d", parol)),
        "Maxsus belgi":       bool(re.search(r"[!@#$%^&*]", parol)),
    }
    return all(talablar.values()), talablar


print(email_togrimi("[email protected]"))
print(email_togrimi("noto'g'ri.email"))
print(telefon_togrimi("+998901234567"))

kuchli, tafsilot = parol_kuchlimi("Python2026!")
print(f"\nParol kuchlimi: {kuchli}")
for talab, bajarildi in tafsilot.items():
    print(f"  [{'+' if bajarildi else '-'}] {talab}")

from datetime import datetime, date, time, timedelta

hozir = datetime.now()

print(hozir.strftime("%d.%m.%Y %H:%M:%S"))
print(hozir.strftime("%A, %d %B %Y"))
print(f"Yil: {hozir.year}, oy: {hozir.month}, kun: {hozir.day}")

# Matndan sanaga
sana = datetime.strptime("15.05.2004", "%d.%m.%Y")
print(sana.date())

# Farqni hisoblash
farq = hozir - sana
print(f"O'tgan kunlar: {farq.days:,}")
print(f"Taxminan {farq.days // 365} yosh")

# Kelajakdagi sana
imtihon = hozir + timedelta(days=30, hours=3)
print(f"Imtihon: {imtihon.strftime('%d.%m.%Y %H:%M')}")

from pathlib import Path

joriy = Path.cwd()
print(f"Joriy papka: {joriy}")

# Fayllarni topish
loyiha = Path(".")
print("\nPython fayllari:")
for fayl in sorted(loyiha.glob("*.py")):
    hajm = fayl.stat().st_size
    print(f"  {fayl.name:<28}{hajm:>8,} bayt")

# Rekursiv qidirish
print(f"\nBarcha .md fayllar: {len(list(loyiha.rglob('*.md')))} ta")

# Yo'llarni birlashtirish
hisobot = joriy / "hisobotlar" / "2026" / "sentabr.csv"
print(f"\nTo'liq yo'l: {hisobot}")
print(f"Papkasi:    {hisobot.parent}")
print(f"Nomi:       {hisobot.stem}")
print(f"Kengaytma:  {hisobot.suffix}")

import math
import statistics

baholar = [85, 92, 78, 95, 88, 76, 91, 84]

print(f"O'rtacha (mean):    {statistics.mean(baholar):.2f}")
print(f"Mediana:            {statistics.median(baholar)}")
print(f"Standart og'ish:    {statistics.stdev(baholar):.2f}")
print(f"Dispersiya:         {statistics.variance(baholar):.2f}")

print(f"\nKvadrat ildiz(144): {math.sqrt(144)}")
print(f"log10(1000):        {math.log10(1000)}")
print(f"5 ning faktoriali:  {math.factorial(5)}")
print(f"Yaxlitlash 4.567:   {round(4.567, 2)}")
print(f"Yuqoriga:           {math.ceil(4.1)}")
print(f"Pastga:             {math.floor(4.9)}")

# hisobot.py
import argparse


def main():
    tahlilchi = argparse.ArgumentParser(
        description="CSV fayldan hisobot tayyorlaydi"
    )
    tahlilchi.add_argument("fayl", help="Kirish CSV fayli")
    tahlilchi.add_argument("-o", "--chiqish", default="hisobot.txt",
                           help="Chiqish fayli nomi")
    tahlilchi.add_argument("-n", "--soni", type=int, default=10,
                           help="Nechta qator chiqarilsin")
    tahlilchi.add_argument("--batafsil", action="store_true",
                           help="Batafsil rejim")

    argumentlar = tahlilchi.parse_args()

    print(f"Kirish fayli:  {argumentlar.fayl}")
    print(f"Chiqish fayli: {argumentlar.chiqish}")
    print(f"Qatorlar soni: {argumentlar.soni}")
    print(f"Batafsil:      {argumentlar.batafsil}")


if __name__ == "__main__":
    main()

python hisobot.py talabalar.csv -n 5 --batafsil

python hisobot.py --help