Programming prompts

Write a Python script that [describe the task]. Input: [describe input data/format] Output: [describe expected output] Python version: [e.g. 3.12] Libraries allowed: [e.g. standard library only, pandas] Requirements: clear variable names, comments for non-obvious parts, error handling for [likely problems], and a small example of how to run it. After the code, explain how it works in plain English and list any assumptions you made.

I have a CSV with these columns and sample rows: [paste column names and 5 sample rows — remove personal data] Problems I see: [e.g. missing values, mixed date formats, duplicates] Goal: [e.g. monthly sales totals by region] Write pandas code that loads the file, fixes these problems step by step with comments explaining each choice, and produces the goal output. Print row counts before and after each cleaning step so I can check nothing was lost unexpectedly.

Explain this JavaScript code to someone with [beginner/intermediate] experience: ```js [paste code] ``` 1. Summarise what it does in 2 sentences. 2. Walk through it section by section. 3. Point out any bugs, security problems or outdated patterns. 4. Suggest one improvement with an example.

Write vanilla JavaScript (no frameworks) to validate this HTML form: ```html [paste form HTML] ``` Rules: [e.g. email required and valid, phone optional, password 12+ characters] Show errors next to each field, link them with aria-describedby, move focus to the first invalid field on submit, and don't block the user from typing. Remind me that server-side validation is still required.

Write a SQL query for [database: PostgreSQL / MySQL / SQL Server / SQLite]. Tables: [paste CREATE TABLE statements or column lists] What I need: [plain-English description, e.g. "top 10 customers by total spend in 2025, with their email and number of orders"] Explain each part of the query, mention any indexes that would help performance, and point out edge cases (e.g. NULLs, ties).

I'm getting this error: ``` [paste full error message and stack trace] ``` Relevant code: ``` [paste the code around where the error happens] ``` Environment: [language version, framework, OS] What I expected: [behaviour] What I've tried: [list] Explain the most likely cause, give the fix, and explain why it works. If there are several possible causes, list them in order of likelihood with a way to check each.

Review this code as a senior developer. ```[language] [paste code] ``` Context: [what it's for] Organise feedback under: Bugs, Security, Performance, Readability, Tests. For each issue: severity (high/medium/low), the line or section, the problem, and the suggested fix. Finish with what's done well.

Add documentation to this code using [docstring style, e.g. Google style, JSDoc]. ```[language] [paste code] ``` Document each function's purpose, parameters, return value, and errors raised. Add comments only where the logic isn't obvious. Don't change the code itself.

Write a README.md for my project. Name: [name] What it does: [description] Tech stack: [list] How to install and run: [steps/commands] Configuration: [environment variables] Licence: [licence] Sections: overview, features, requirements, installation, usage with examples, configuration, contributing, licence. Keep it concise and use code blocks for commands.

Help me plan this feature before I write code. Project: [description and tech stack] Feature: [what users should be able to do] Constraints: [deadlines, performance, existing architecture] Give: user stories, acceptance criteria, data model changes, API/interface changes, edge cases, security considerations, a task breakdown in the order to build it, and the tests I should write.

Write unit tests for this function using [test framework, e.g. pytest, Jest, Vitest]. ```[language] [paste function] ``` Cover normal inputs, edge cases (empty, zero, very large, unusual characters), and error handling. Use clear test names that describe the expected behaviour. Point out any behaviour that seems like a bug rather than writing a test that passes for it.