Python Practice
Real-life problems solved with Python. Read the scenario, write the program, and see your answer checked against hidden tests.
Basic10 pts
Electricity bill calculator
Basics & Math
Solve challengeBasic10 pts
Restaurant bill with GST and tip
Basics & Math
Solve challengeBasic10 pts
Count the vowels in a customer message
Strings
Solve challengeBasic10 pts
The cashier who always grabs the biggest note
Algorithms
Solve challengeBasic10 pts
Find the best 7 days of the season
Algorithms
Solve challengeBasic10 pts
Does this template close properly?
Algorithms
Solve challengeBasic10 pts
Longest streak with stock on the shelf
Algorithms
Solve challengeBasic10 pts
Build the league table with tiebreakers
Lists & Dictionaries
Solve challengeBasic10 pts
The 90th percentile delivery promise
Data Analysis
Solve challengeBasic10 pts
Emergency room wait-time summary
Data Analysis
Solve challengeBasic10 pts
Did the new checkout button win?
Data Analysis
Solve challengeBasic10 pts
Spot the odd card payments
Data Analysis
Solve challengeBasic10 pts
Ad spend versus sales: fit the line
Data Analysis
Solve challengeBasic10 pts
VAT across borders
Basics & Math
Solve challengeBasic10 pts
Wholesale price tiers and free shipping
Basics & Math
Solve challengeBasic10 pts
Overtime on the factory floor
Simulation & Finance
Solve challengeBasic10 pts
Leap days in a long contract
Dates & Time
Solve challengeBasic10 pts
How many cups to break even?
Simulation & Finance
Solve challengeBasic10 pts
Wet days in a world city
Files & CSV
Solve challengeBasic10 pts
How late is this airline?
Files & CSV
Solve challengeBasic10 pts
Big baskets by country
Files & CSV
Solve challengeBasic10 pts
Which month did a channel convert?
Data Analysis
Solve challengeBasic10 pts
Peak power month of a region
Files & CSV
Solve challengeBasic10 pts
Tidy up the customer names
Strings
Solve challengeBasic10 pts
Which mail providers do our subscribers use?
Lists & Dictionaries
Solve challengeBasic10 pts
Show only the last four digits
Strings
Solve challengeBasic10 pts
Collect the campaign hashtags
Strings
Solve challengeBasic10 pts
Run-length squeeze for sensor strings
Strings
Solve challengeIntermediate25 pts
Sales report for a category
Files & CSV
Solve challengeIntermediate25 pts
Most common words in customer feedback
Lists & Dictionaries
Solve challengeIntermediate25 pts
Students with attendance shortage
Lists & Dictionaries
Solve challengeIntermediate25 pts
How many loading docks does the warehouse need?
Algorithms
Solve challengeIntermediate25 pts
Smallest truck that clears the backlog in D days
Algorithms
Solve challengeIntermediate25 pts
How many periods hit the revenue target exactly?
Lists & Dictionaries
Solve challengeIntermediate25 pts
Fewest connections between two cities
Algorithms
Solve challengeIntermediate25 pts
Top K trending hashtags of the match
Lists & Dictionaries
Solve challengeIntermediate25 pts
Satellite map: islands left by the flood
Algorithms
Solve challengeIntermediate25 pts
Forecast bake-off: naive, average or smoothing?
Data Analysis
Solve challengeIntermediate25 pts
RFM scoring for a London fashion shop
Lists & Dictionaries
Solve challengeIntermediate25 pts
Cohort retention for a language-learning app
Lists & Dictionaries
Solve challengeIntermediate25 pts
ABC classification for a Rotterdam warehouse
Lists & Dictionaries
Solve challengeIntermediate25 pts
Check-in desks at Istanbul Airport
Simulation & Finance
Solve challengeIntermediate25 pts
Which streaming plan is worth the ad budget?
Simulation & Finance
Solve challengeIntermediate25 pts
Income tax slabs from a rate table
Basics & Math
Solve challengeIntermediate25 pts
Currency desk conversion ledger
Simulation & Finance
Solve challengeIntermediate25 pts
Loan EMI with an adjusted last payment
Simulation & Finance
Solve challengeIntermediate25 pts
Mid-cycle plan change
Dates & Time
Solve challengeIntermediate25 pts
SLA deadline in business days
Dates & Time
Solve challengeIntermediate25 pts
Tenure report and next work anniversary
Dates & Time
Solve challengeIntermediate25 pts
Months until the savings goal
Simulation & Finance
Solve challengeIntermediate25 pts
Slowest hospital departments at rush hour
Lists & Dictionaries
Solve challengeIntermediate25 pts
Build the league table
Data Analysis
Solve challengeIntermediate25 pts
Support team scorecard (two files)
Data Analysis
Solve challengeIntermediate25 pts
Days a stock beats its moving average
Simulation & Finance
Solve challengeIntermediate25 pts
Month-over-month swings in energy demand
Data Analysis
Solve challengeIntermediate25 pts
Longest heatwave streak
Data Analysis
Solve challengeIntermediate25 pts
Order value histogram
Data Analysis
Solve challengeIntermediate25 pts
Which microservices are on fire?
Lists & Dictionaries
Solve challengeIntermediate25 pts
Dial it right: phone number normaliser
Strings
Solve challengeIntermediate25 pts
IBAN checksum inspector
Strings
Solve challengeIntermediate25 pts
Hackathon leaderboard with dense ranks
Lists & Dictionaries
Solve challengeIntermediate25 pts
Throttle the noisy API clients
Simulation & Finance
Solve challengeIntermediate25 pts
Dissect the tracking URLs
Strings
Solve challengeIntermediate25 pts
What are customers really saying?
Lists & Dictionaries
Solve challengeExpert50 pts
Detect duplicate card transactions
Algorithms
Solve challengeExpert50 pts
Merge overlapping room bookings
Algorithms
Solve challengeExpert50 pts
Best day to buy and sell
Algorithms
Solve challengeExpert50 pts
Spend the ad budget for the most leads
Algorithms
Solve challengeExpert50 pts
Contract redline: how much really changed?
Algorithms
Solve challengeExpert50 pts
Cheapest fare and how many ways to fly it
Algorithms
Solve challengeExpert50 pts
Build schedule for a new hospital wing
Algorithms
Solve challengeExpert50 pts
Watching a social network grow its biggest circle
Algorithms
Solve challengeExpert50 pts
Emergency room: who gets the next doctor?
Algorithms
Solve challengeExpert50 pts
Reorder point simulation for a Lagos pharmacy chain
Simulation & Finance
Solve challengeExpert50 pts
Nearest-driver dispatch in Jakarta
Simulation & Finance
Solve challengeExpert50 pts
How many extra tickets can a flight sell?
Simulation & Finance
Solve challengeExpert50 pts
Build the league table with head-to-head tie-breaks
Lists & Dictionaries
Solve challengeExpert50 pts
Anomalies that do not poison the baseline
Data Analysis
Solve challengeExpert50 pts
Black Friday forecast: seasonality plus trend
Data Analysis
Solve challengeExpert50 pts
FIFO inventory: cost of goods sold
Simulation & Finance
Solve challengeExpert50 pts
Triangular currency arbitrage scanner
Algorithms
Solve challengeExpert50 pts
Break-even with a sales mix and step costs
Simulation & Finance
Solve challengeExpert50 pts
Renewal schedule with plan upgrades
Dates & Time
Solve challengeExpert50 pts
How much does a yearly prepayment save?
Simulation & Finance
Solve challengeExpert50 pts
Hospital shift payroll with night and Sunday premiums
Simulation & Finance
Solve challengeExpert50 pts
Savings interest on daily balances
Dates & Time
Solve challengeExpert50 pts
Clean the messy order export
Data Analysis
Solve challengeExpert50 pts
Spot the outlier flights
Data Analysis
Solve challengeExpert50 pts
Waiting-time percentiles by hospital site
Data Analysis
Solve challengeExpert50 pts
School league with shared ranks
Data Analysis
Solve challengeExpert50 pts
Week-over-week traffic growth
Dates & Time
Solve challengeExpert50 pts
Maximum drawdown of a stock
Simulation & Finance
Solve challengeExpert50 pts
SLA breaches by ticket priority
Dates & Time
Solve challengeExpert50 pts
Pocket calculator with exact fractions
Algorithms
Solve challengeExpert50 pts
Sessionise the clickstream
Dates & Time
Solve challengeExpert50 pts
Bracket tags gone wrong
Algorithms
Solve challengeExpert50 pts
Find the customers who signed up twice
Algorithms
Solve challengeExpert50 pts
Checkout with three-for-two deals
Lists & Dictionaries
Solve challengeExpert50 pts
A tiny mail-merge template engine
Strings
Solve challengeExpert50 pts
Revenue rollup from nested JSON orders
Data Analysis
Solve challenge