How deeply does Python How-To cover json.dump()?

Defines direct file serialization and custom-class limitations, but does not detail custom encoding implementation.

Json.dump()

dump is a json-module function that serializes a Python object and writes the resulting JSON representation to a file-like object.

json.dump() serializes a Python object and writes the resulting JSON representation directly to a file-like object. JSON is widely used for exchanging data between systems, and the json module provides dump and load methods for processing JSON files. section 9.3.5

Write a Python object to a JSON file

import json with open("tasks.json", "w") as file: json.dump(tasks, file) section 9.3.5

Keep these usage distinctions in mind:

Use dump for a JSON file and dumps for a JSON string; their calling patterns are closely related. section 9.3.5
Native Python objects can be serialized, but instances of custom classes are not JSON-serializable by default; provide custom encoding behavior when needed. section 9.3.5

How Python How-To covers it

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A Pythonic Adventure: From Python basics to a working web appThe Python json.dump function serializes a Python object as JSON and writes the result to a file-like object.
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The Quick Python Book, Fourth Editionjson.dump() is a Python function that serializes a Python value as JSON and writes it to a file-like object.

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Related concepts

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json.loadcontrasts with · json.load() is a Python function that reads and parses JSON from a file-like object into the corresponding Python value.

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