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libqasm Python Package

Project description

libQASM

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libQASM is a library to parse programs written in the cQASM quantum programming language, developed by QuTech. At the moment, libQASM only supports cQASM v3.0 programs.

It performs lexical, syntactic, and semantic analysis of an input program received via a file or a string. It produces one of the following results:

  • A syntactic or semantic AST (Abstract Syntax Tree) object. Depending on if we are parsing or analysing.
  • A list of parsing or analysing errors. In case the input program was malformed.
  • A JSON representation of either the AST or the list of errors.

It can be used within:

Check out QX simulator and OpenSquirrel compiler for an example of use in a C++ and a Python project, respectively.

Getting started

Given a cQASM program example.cq.

version 3.0

qubit[2] q
bit[2] b

H q[0]
CNOT q[0], q[1]
b = measure q

We can parse or analyze this circuit, using libQASM through the following programming language:

C++

#include "v3/cqasm-py.hpp"

int main() {
    auto parse_result = V3xAnalyzer::parse_file("example.cq");
    
    auto analyzer = V3xAnalyzer();
    auto analysis_result = analyzer.analyze_file("example.cq");
}

Emscripten

The emscripten API only allows to input a cQASM program as a string.

import { default as wrapper } from 'cqasm_emscripten.mjs';

wrapper().then(function(result: any) {
    let analyzer = new result["EmscriptenWrapper"]()
    let program = `
        version 3
        qubit[2] q
        bit[2] b 
        H q[0]
        CNOT q[0], q[1]
        b = measure q
    `
    let output = analyzer.parse_string_to_json(program)
    analyzer.delete()
}).catch((error: any) => {
    console.error("unhandledRejection", error, "\n");
});

Python

from libqasm import Analyzer

if __name__ == "__main__":
    parse_result = Analyzer.parse_file('example.cq')

    analyzer = Analyzer()
    analysis_result = analyzer.analyze_file('example.cq')

Documentation

The libQASM documentation is hosted through GitHub Pages.

License

libQASM is licensed under the Apache License, Version 2.0. See LICENSE for the full license text.

Authors

Quantum Inspire: support@quantum-inspire.com

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