Over 560 examples with explanations: Python and SQL. Run an example right in the app, add your own, work offline.
An everyday Python reference, from strings and collections to threading and design patterns. Every example comes with an explanation, and most of them run.
The construct is on the tip of your tongue, but the exact syntax slips away:
• How do you sort a dictionary by value?
• How do you serialize a class to JSON and read it back?
• How do you start a thread and wait for the result?
The app answers with a working example; all that is left is to fit it to your task.
• 22 sections: basic types, arrays and collections, classes, files, serialization, functions and lambdas, exceptions, regular expressions, threading, databases, algorithms, design patterns.
• Run in the app: the example actually runs and the output appears under the code. Needs an internet connection; the daily limit is 30 runs.
• What changed in new versions: 8 sections from Python 3.0 to 3.13, with the old and the new code side by side.
• Keyword and function reference: over 200 articles, browsable as a list or searchable by word.
• SQL alongside: over 200 queries against a live practice database (JOIN, GROUP BY, subqueries, data types). Queries have their own daily limit.
• Edit examples and add your own; they stay in the app and are always at hand.
• Search looks inside the code itself, not just the titles: remember a fragment and you will find the example.
• Everything except running works offline: examples, search, favorites.
• Comfortable to read: light and dark themes, your own font and size, line numbers, and long lines wrap instead of spilling off the screen.
Examples are drawn from professional sources and verified by running them.
Built by a developer for developers. In active development since 2015.
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• Copying code is open in the free version too, with no limit.
• Supports iOS 17 and macOS 14.
Version 4.07
The developer, Fedor Obraztsov, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Privacy practices may vary based, for example, on the features you use or your age. Learn More
The developer indicated that this app supports the following accessibility features. Learn More