Bugun nimalarni o'rganamiz?

Takrorlash

Fayl bilan ishlash

Faylga yozish

with open("kundalik.txt", "w", encoding="utf-8") as f:
    f.write("Birinchi qator\n")
    f.write("Ikkinchi qator\n")

with open("kundalik.txt", "a", encoding="utf-8") as f:
    f.write("Uchinchi qator\n")
  

Mini-test

O'qish usullari

Fayldan o'qish

with open("kundalik.txt", encoding="utf-8") as f:
    hammasi = f.read()
print(hammasi)

with open("kundalik.txt", encoding="utf-8") as f:
    for qator in f:
        print(qator.strip())

with open("kundalik.txt", encoding="utf-8") as f:
    qatorlar = f.readlines()
print(len(qatorlar))
  

Mini-test

Xavfsiz o'qish

Yozuvlar funksiyalari

def yozuv_qosh(matn, nom="kundalik.txt"):
    with open(nom, "a", encoding="utf-8") as f:
        f.write(matn + "\n")

def yozuvlar(nom="kundalik.txt"):
    try:
        with open(nom, encoding="utf-8") as f:
            return f.read().splitlines()
    except FileNotFoundError:
        return []

yozuv_qosh("Python o'rgandim", "yangi.txt")
print(yozuvlar("yangi.txt"))   # ["Python o'rgandim"]
print(yozuvlar("yoq.txt"))     # []
  

Mini-test

w va a rejimi

Atamalar. Bosing

Fayl bilan ishlash

Qo'shib yozish

with open("log.txt", "w") as f:
    f.write("yangi\n")   # eski yozuvlar o'chadi
  

Qo'shib yozish

with open("log.txt", "a") as f:
    f.write("yangi\n")   # eskisi saqlanadi
  

Fayllar raqamlarda

Doim with va encoding yozing.

Amaliy topshiriq 20 daqiqa

Dars xulosasi

Uyga vazifa: «Kundalik» dasturi: faylga yozish va o'qish.