PythonCodable

Swift framework to efficiently bridge objects from Python to Swift.

Requirements

PythonCodable requires Swift 5 or higher.

Usage

PythonCodable builds on PythonKit to allow bridging arbitrary Python objects into Swift types efficiently using PythonDecoder:

import PythonKit
import PythonCodable
// 1. Get a valid Python object:
leturllibParse=Python.import("urllib.parse")letpythonParsedURL= urllibParse.urlparse("http://www.cwi.nl:80/%7Eguido/Python.html")print(pythonParsedURL) // ParseResult(scheme='http', netloc='www.cwi.nl:80'...
print(Python.type(pythonParsedURL)) // <class 'urllib.parse.ParseResult'>
// 2. Define a compatible Swift struct conforming to `Decodable`:
structParsedURL:Decodable{letscheme:Stringletnetloc:Stringletpath:Stringletparams:String?letquery:String?letfragment:String?}
// 3. Decode the Python object as a Swift type using `PythonDecoder`:
letparsedURL=tryPythonDecoder.decode(ParsedURL.self, from: pythonParsedURL)XCTAssertEqual(parsedURL.scheme,"http")XCTAssertEqual(parsedURL.netloc,"www.cwi.nl:80")XCTAssertEqual(parsedURL.path,"/%7Eguido/Python.html")

PythonDecoder supports multiple Python to Swift type conversions:

• int to Int
• float to Double
• bool to Bool
• None to nil
• list[t] to Array<T> where t is one of the supported types.
• dict[k, v] to Dictionary<K, T> where k is a str and v is one of the supported types.
• object to Any : Decodable where object is a dict, a named tuple or an object with a dictionary representation.

Swift Package Manager

Add the following dependency to your Package.swift manifest:

.package(url:"https://github.com/pvieito/PythonCodable.git",.branch("master")),

References

• PythonKit