Json.dump()
json.dump() is a Python standard-library function that serializes a Python object as JSON and writes the result to a file-like object.
A Pythonic Adventure: From Python basics to a working web app
The Python json.dump function serializes a Python object as JSON and writes the result to a file-like object.
- How it is used
- Writes Python order data as JSON so an application can save it in a file.
- How deep it goes
- Explains the two required arguments, optional indentation, and file closing, but does not examine serialization internals.
- Examples
- Uses coffee orders, orders.json, a list of orders, and readable indent=4 output.
- What you can do after
- Apply it via Python’s json module to save dictionaries or lists as JSON files.
Read how A Pythonic Adventure: From Python basics to a working web app explains json.dump() →
The Quick Python Book, Fourth Edition
json.dump() is a Python function that serializes a Python value as JSON and writes it to a file-like object.
- How it is used
- Writes serialized Python data to JSON files during data storage and network-data handling.
- How deep it goes
- Explains the file-like destination, formatting option, dump-versus-dumps distinction, and repeated-object limitation.
- Examples
- Demonstrates saving a weather dictionary, pretty-printing JSON, and grouping multiple weather reports under one object.
- What you can do after
- Apply it via Python’s json module to write one valid JSON structure to a file.
Read how The Quick Python Book, Fourth Edition explains json.dump() →
Python How-To
dump is a json-module function that serializes a Python object and writes the resulting JSON representation to a file-like object.
- How it is used
- Processes JSON files directly for data exchange between different systems.
- How deep it goes
- Defines direct file serialization and custom-class limitations, but does not detail custom encoding implementation.
- Examples
- Uses JSON strings, JSON files, native Python objects, and custom-class instances as serialization cases.
- What you can do after
- Apply it via Python's json module to serialize a Python object into a JSON file.
Related concepts
- jsonpart of · The Python json module is a standard-library module for encoding Python objects as JSON and decoding JSON into Python objects.
- file objectuses · A file object is a program-accessible representation of an open file or stream, including its access state and input/output operations.
- json.dumps()contrasts with · json.dumps() is a Python function that serializes a Python object into a JSON-formatted string.
- pickle formatproduces · The pickle format is Python’s serialization format for encoding Python objects so they can be stored and later loaded.
- JSONproduces · JSON is a standardized, language-independent text format for representing structured data using objects, arrays, strings, numbers, Boolean values, and null.
- 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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