DEV Community: Farhan Ahmad

5 Tiny Python Scripts That Automate Boring Tasks (Beginner Friendly)

Farhan Ahmad — Mon, 26 Oct 2026 15:41:31 +0000

You don't need to be an expert to make Python do real work for you. Here are 5 short scripts I use to show beginners how automation feels. Every one of them was tested with Python 3.12 and uses only the standard library, so there is nothing to install.

1. Sort a messy folder by file type

import shutil
from pathlib import Path

folder = Path("Downloads")
for f in folder.iterdir():
    if f.is_file():
        ext = f.suffix[1:].lower() or "other"
        (folder / ext).mkdir(exist_ok=True)
        shutil.move(str(f), folder / ext / f.name)

Your PDFs go into pdf/, photos into jpg/, and so on. Run it once and your Downloads folder is clean.

2. Rename hundreds of photos in one go

from pathlib import Path

folder = Path("photos")
for i, f in enumerate(sorted(folder.glob("*.jpg")), 1):
    f.rename(folder / f"photo_{i:03}.jpg")

Output: photo_001.jpg, photo_002.jpg, ... The :03 pads numbers with zeros so they stay in order.

3. Add up a sales CSV

import csv

total = 0
with open("sales.csv", newline="") as fh:
    for row in csv.DictReader(fh):
        total += float(row["price"]) * int(row["qty"])
print(f"Total sales: {total:.2f}")

With a file containing pen (20 x 3), book (150 x 2) and bag (900 x 1), it prints Total sales: 1260.00. This is exactly the kind of job small businesses pay freelancers to automate.

4. Find the most common words in a text

from collections import Counter

text = "Python makes boring tasks easy. Python is fun and Python is free."
words = [w.strip(".,").lower() for w in text.split()]
print(Counter(words).most_common(3))

Output: [('python', 3), ('is', 2), ('makes', 1)]

5. Generate a strong password

import secrets, string

chars = string.ascii_letters + string.digits + "!@#$"
print("".join(secrets.choice(chars) for _ in range(12)))

Use secrets, not random, for anything security related. secrets is designed for it.

What to do next

Pick one script, change one thing (a folder name, a column, the password length) and run it again. That small habit of tweaking working code is how beginners turn into developers.

If you want 60 more tested programs like these, with real outputs, solved exercises, a practice test and a bonus AI automation chapter, I put them together in my book Python Programming for Beginners: https://farhanbreeze4.gumroad.com/l/ugosjh

Which boring task would you automate first? Tell me in the comments.

10 C++ Interview Questions Every Beginner Should Be Able to Answer

Farhan Ahmad — Mon, 26 Oct 2026 11:39:38 +0000

If you are learning C++ for a university exam, a lab viva, or your first job interview, the same basic questions come up again and again. Here are ten of them with short, clear answers.

1. What is the difference between `=` and `==`?

= assigns a value (x = 5;). == compares two values (if (x == 5)). Writing if (x = 5) compiles, but it assigns 5 and is always true — a classic bug.

2. What is the difference between a compiler and an interpreter?

A compiler translates the whole program into machine code before it runs (C++ does this). An interpreter translates and runs code line by line (like Python).

3. What are the basic data types in C++?

int (whole numbers), float and double (decimals), char (a single character), and bool (true/false). std::string is used for text.

4. What is the difference between `while` and `do-while`?

while checks the condition first, so it may run zero times. do-while checks at the end, so it always runs at least once.

5. What is a function, and why use one?

A named block of code that does one job. Functions remove repetition, make code easier to test, and make programs easier to read.

6. Pass by value vs pass by reference?

By value, the function gets a copy, so changes don't affect the original. By reference (int &x), the function works on the original variable.

7. What is an array?

A fixed-size collection of elements of the same type stored next to each other in memory. Indexes start at 0, so int a[5] goes from a[0] to a[4].

8. What is a pointer?

A variable that stores a memory address. int *p = &x; makes p point to x, and *p gives the value of x.

9. What is the difference between a structure and a class?

Both group related data. In a struct, members are public by default; in a class, they are private by default.

10. Why do we write `return 0;` in `main()`?

It tells the operating system the program ended successfully. A non-zero value usually means an error.

Practise answering these out loud — that is exactly how vivas and interviews test you.

I put 30 of these questions, a quick-revision cheat sheet, and 75 tested programs into a beginner-friendly ebook. If you want the full set, it's C++ Programming for Beginners ($9): https://farhanbreeze4.gumroad.com/l/kxwlwo

Which question would you add to this list? Let me know in the comments.

7 C++ Mistakes Every Beginner Makes (and How to Fix Them)

Farhan Ahmad — Sun, 25 Oct 2026 18:43:15 +0000

When you start learning C++, the compiler can feel like it's out to get you. Most of the time, though, beginners trip over the same handful of mistakes. Here are seven I see again and again, with a quick fix for each.

1. Forgetting to initialize variables

int total;
total = total + 5;   // total holds garbage!

In C++, a local variable is not set to zero for you. It holds whatever was in that memory before.

Fix: always give variables a starting value.

int total = 0;
total += 5;

2. Using `=` instead of `==` in conditions

if (marks = 50) {   // assigns 50, always true
    cout << "Pass";
}

Fix: use == to compare. Many developers turn on compiler warnings (-Wall) so the compiler catches this for them.

if (marks == 50) { ... }

3. Off-by-one errors in loops

int arr[5] = {1, 2, 3, 4, 5};
for (int i = 0; i <= 5; i++) {   // arr[5] does not exist
    cout << arr[i];
}

An array of size 5 has indexes 0 to 4.

Fix: loop with i < 5, or better, use a range-based loop:

for (int x : arr) cout << x << " ";

4. Integer division surprises

int a = 7, b = 2;
double avg = a / b;   // 3, not 3.5

Both operands are int, so C++ does integer division first, then converts.

Fix: make one side a double.

double avg = static_cast<double>(a) / b;   // 3.5

5. Mixing `cin >>` and `getline`

int age;
string name;
cin >> age;
getline(cin, name);   // reads an empty line!

cin >> age leaves the newline in the input buffer, and getline reads it immediately.

Fix: clear the leftover newline first.

cin >> age;
cin.ignore();
getline(cin, name);

6. Missing `break` in `switch`

switch (choice) {
    case 1: cout << "Add";
    case 2: cout << "Delete";   // runs too when choice is 1
}

Fix: end each case with break; unless you really want it to fall through.

7. Passing big objects by value

void printList(vector<int> v) { ... }   // copies the whole vector

Fix: pass by const reference when you only need to read it.

void printList(const vector<int>& v) { ... }

Wrapping up

Almost every beginner hits these, so don't worry if you recognized a few. Turn on compiler warnings, test with small inputs, and read error messages slowly; they usually point right at the problem.

If you want a structured path from the very basics (variables, loops, functions, arrays, pointers, OOP) with worked examples and practice questions, I wrote a beginner-friendly ebook: C++ Programming for Beginners — https://farhanbreeze4.gumroad.com/l/kxwlwo

Which of these mistakes got you first? Drop it in the comments.