File I/O di Python

Python menyediakan fungsi built-in untuk membaca dan menulis file.

Membaca File

# Cara terbaik: with statement (auto-close)
with open("data.txt", "r") as file:
    content = file.read()
    print(content)

# Baca per baris
with open("data.txt", "r") as file:
    for line in file:
        print(line.strip())

Menulis File

# Write (overwrite)
with open("output.txt", "w") as file:
    file.write("Baris pertama\n")
    file.write("Baris kedua\n")

# Append (tambah di akhir)
with open("log.txt", "a") as file:
    file.write("Log entry baru\n")

JSON File

import json

# Menulis JSON
data = {"nama": "Budi", "umur": 25}
with open("data.json", "w") as f:
    json.dump(data, f, indent=2)

# Membaca JSON
with open("data.json", "r") as f:
    loaded = json.load(f)
    print(loaded["nama"])

CSV File

import csv

# Membaca CSV
with open("data.csv", "r") as f:
    reader = csv.reader(f)
    for row in reader:
        print(row)