pycom-documentation/content/firmwareapi/micropython/_index.md

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MicroPython Modules

The following list contains the standard Python libraries, MicroPython-specific libraries and Pycom specific modules that are available on the Pycom devices.

The standard Python libraries have been "micro-ified" to fit in with the philosophy of MicroPython. They provide the core functionality of that module and are intended to be a drop-in replacement for the standard Python library.

Some modules are available by an u-name, and also by their non-u-name. The non-u-name can be overridden by a file of that name in your package path. For example, import json will first search for a file json.py or directory json and load that package if it's found. If nothing is found, it will fallback to loading the built-in ujson module.