Checking whether a Python string contains a substring is one of the first things new developers reach for, whether it’s validating an email address, searching log output or filtering a list of names. Python gives you several ways to do…
Python indentation is not a style choice. The spaces at the start of a line tell Python which statements belong to the same block, and getting this wrong throws an error before your code even runs. This guide covers the…
Use these 100 artificial intelligence multiple-choice questions to check the foundations that recur in exams, interviews, and early AI coursework, including search, machine learning, neural networks, natural language processing, agents, and knowledge representation. Answer each question before opening its explanation,…
Google AI Studio lets you create a Gemini API key and start on the Gemini API Free Tier. Free access is useful for learning, prototypes, and low-volume experiments, but quotas depend on the selected model and Google can change them.…
The official DeepSeek API uses token billing, so an API key is not a permanent free resource. DeepSeek’s July 2026 documentation lists deepseek-v4-flash and deepseek-v4-pro, and it schedules deepseek-chat and deepseek-reasoner for deprecation on July 24, 2026. A provider can…
Perplexity API Key Tester Send one small request directly from your browser to Perplexity. The request uses your API account and can incur the normal API charge. Use a disposable development key. Perplexity advises against exposing API keys in client-side…
Gemini API Key Tester Send one stateless test request from your browser directly to Google’s Gemini Interactions API. CodeForGeek does not store or proxy the key. Gemini API key Model gemini-3.5-flashgemini-3.1-flash-litegemini-2.5-flash Test prompt Test key Copy safer cURL Clear Result…
AI API costs climb when every request goes to the same model, repeated prompts miss the cache, and retries have no ceiling. My Node.js 26.5.0 run checked the router’s utility, premium, cache, fallback, rate-limit, and cost branches with assertions. Route…
Z.ai vs ChatGPT is a choice between a low-cost GLM model stack built around coding volume and a broader assistant with stronger consumer features. I rechecked both products on July 18, 2026, and the decision comes down to your workload,…
Python rounding looks simple until round(2.5) returns 2 instead of 3, or round(2.675, 2) hands back 2.67 when you expected 2.68. Those are not bugs. They come from how Python breaks ties and how floats get stored in binary. This…
