Python File Handling

# Writing to a file
with open("students.txt", "w") as f:
    f.write("Rahul - 85\n")
    f.write("Priya - 92\n")
    f.write("Amit - 78\n")
print("File written! ✅")
# Reading entire file
with open("students.txt", "r") as f:
    content = f.read()
    print(content)
# Reading line by line
with open("students.txt", "r") as f:
    for line in f:
        print(line.strip())
# Appending to file
with open("students.txt", "a") as f:
    f.write("Sara - 88\n")
print("Data appended! ✅")
# Count lines in file
with open("students.txt", "r") as f:
    lines = f.readlines()
    print(f"Total students: {len(lines)}")
# Writing CSV-style data
students = [
    {"name": "Rahul", "marks": 85},
    {"name": "Priya", "marks": 92},
]
with open("marks.csv", "w") as f:
    f.write("Name,Marks\n")
    for s in students:
        f.write(f"{s[\"name\"]},{s[\"marks\"]}\n")
print("CSV created! ✅")