Lesson 08 of 55
15 mins readPython Type Aliases
In Plain English
Type aliases give a distinct, reusable name to any type. Unlike interfaces, type aliases can represent primitives, unions, tuples, and intersections directly.
Core Rules to Remember
Reusable Identifier: Assigns a descriptive name to complex composite shapes or primitives.
Broad Flexibility: Can alias unions, primitives, tuples, and intersections.
Live Interactive Example
Hit Run Code to see it liveCreating Reusable Type Aliases
Python 3.12
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Output Console
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How it works: Type aliases enable concise composition of tuples and object types.
Your Turn: Micro Challenge
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Micro Exercise
Build a Data Pipeline Record Type
- Define a type alias named LogRecord with properties: id (string), timestamp (number), and level ("info" | "warn" | "error").
- Create an entry variable of type LogRecord with id "log-101", timestamp 1700000000, and level "info".
- Print the log level and id.
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Sandbox Output
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