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skills.py

class PythonDeveloper:
    def __init__(self, name):
        self.name = name
        self.skills = []
        self.certificates = []

    def learn(self, topic):
        self.skills.append(topic)
        return f"✅ Learned {topic}!"

    def get_certified(self):
        self.certificates.append("🏆")
        return "Certified!"

dev = PythonDeveloper("You")
print(dev.learn("FastAPI"))|

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Coding Challenges

Solve real problems, earn points, climb the ranks

Coin change (DP)

Find the minimum number of coins to make exactly the target amount.

+30 pts Be first Solve →

GCD via Euclid

Compute the greatest common divisor of two positive integers.

+10 pts Be first Solve →

Sliding window maximum

Return the maximum of each window of size k as it slides across an array.

+40 pts Be first Solve →

Curry a function

Auto-curry any multi-argument function so it returns partial applications until fully saturated.

+35 pts Be first Solve →

Factorial (iterative)

Compute n! iteratively without recursion.

+8 pts Be first Solve →

Temperature converter

Convert Celsius to Fahrenheit: F = C × 9/5 + 32.

+5 pts 2 attempts Solve →

Most frequent element

Return the element that appears most often in a list.

+8 pts Be first Solve →

Longest common prefix

Find the longest common prefix among a list of strings.

+18 pts Be first Solve →

Maximum subarray (Kadane)

Find the contiguous subarray with the largest sum.

+25 pts Be first Solve →

2D Vector dataclass

Implement a Vector2D dataclass with +, -, scalar *, dot product, and magnitude.

+20 pts Be first Solve →

Rotate array

Rotate a list right by k positions in place.

+20 pts Be first Solve →

Flatten nested list

Yield every integer from an arbitrarily nested list, depth-first.

+25 pts Be first Solve →

Python Code Samples

Copy-ready snippets — study, paste, and run in the browser IDE

Build a Command-Line To-Do List Application with Data Persistence in Python

Compress and Extract ZIP Files Programmatically in Python

Build a Complete Web Scraper with Requests and BeautifulSoup in Python

How to Fetch Weather Data from a Public API in Python

How to Find HTML Elements by Tag, Class, ID, CSS Selector, and Attribute in BeautifulSoup

How to Scrape Headlines from a News Website Using Beautiful Soup in Python

Convert CSV Files to JSON in Python

Build a Network Ping Monitor in Python

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Free to use — open the IDE and start typing.

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main.py Preview

# PythonSkillset IDE
def greet(name):
    return f"Hello, {name}!"

print(greet("world"))

Hello, world!

exit 0

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Code formatter

Clean Python with PEP 8

Paste messy code into a split editor, pick line length, and format with autopep8 on the server — then copy the result.

Side-by-side — input and formatted output at a glance.
Your rules — line length presets (79–120).
No install — runs in the browser, formatting hits our API.

Open Python code formatter Line length · copy output

Formatter preview Demo

Before

def calculate( x,y ):
    result=x+y
    if result>10:
       print( "Big!" )
    else:
         print( "Small" )
    return result

After

def calculate(x, y):
    result = x + y
    if result > 10:
        print("Big!")
    else:
        print("Small")
    return result

Illustration only — open the formatter to use your own code.

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87 challenges

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72 challenges

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Tech Articles & Guides

Languages, tools, and notes worth keeping—sorted by topic

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