1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89

// Copyright © 2021 HQS Quantum Simulations GmbH. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
// in compliance with the License. You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software distributed under the
// License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
// express or implied. See the License for the specific language governing permissions and
// limitations under the License.

#![deny(missing_docs)]
#![deny(missing_crate_level_docs)]
#![deny(missing_debug_implementations)]

//! Qoqo quantum computing toolkit
//!
//! Quantum Operation Quantum Operation
//! Yes we use [reduplication](https://en.wikipedia.org/wiki/Reduplication)

use pyo3::prelude::*;
use pyo3::types::PyDict;
use pyo3::wrap_pymodule;

pub mod operations;
use operations::*;

pub mod measurements;
use measurements::*;

mod circuit;
pub use circuit::{convert_into_circuit, CircuitWrapper, OperationIteratorWrapper};

/// qoqo version information, used for qoqo import/export checks
pub const QOQO_VERSION: &str = env!("CARGO_PKG_VERSION");

use roqoqo::RoqoqoError;
use thiserror::Error;

/// Errors that can occur in qoqo.
#[derive(Error, Debug, PartialEq)]
pub enum QoqoError {
    /// Error an Operation cannot be extracted from PyAny object passed from python.
    #[error("Converting PyAny to Operation not possible")]
    ConversionError,
    /// Error a Circuit cannot be extracted from PyAny object passed from python.
    #[error("Cannot extract Circuit from python object")]
    CannotExtractCircuit,
    /// Error for version mismatch between separately compiled packages.
    ///
    /// Error when trying to extract a Circuit from a PyAny python object that has been created
    /// from a python package that has been compiled separately.
    /// To avoid unexpected behaviour this is only allowed when qoqo and roqoqo in both packages are the same version.
    #[error("Package versions of qoqo and roqoqo do not match versions of qoqo object passed from python")]
    VersionMismatch,
    /// Transparent forwarding of roqoqo errors.
    #[error(transparent)]
    RoqoqoError(#[from] RoqoqoError),
}

/// Quantum Operation Quantum Operation (qoqo)
///
/// Yes, we use reduplication.
///
/// qoqo is the HQS python package to represent quantum circuits.
///
/// .. autosummary::
///     :toctree: generated/
///
///     Circuit
///     operations
///     measurements
///
#[pymodule]
fn qoqo(_py: Python, module: &PyModule) -> PyResult<()> {
    module.add_class::<CircuitWrapper>()?;
    let wrapper = wrap_pymodule!(operations);
    module.add_wrapped(wrapper)?;
    let wrapper2 = wrap_pymodule!(measurements);
    module.add_wrapped(wrapper2)?;

    // Adding nice imports corresponding to maturin example
    let system = PyModule::import(_py, "sys")?;
    let system_modules: &PyDict = system.getattr("modules")?.downcast()?;
    system_modules.set_item("qoqo.operations", module.getattr("operations")?)?;
    system_modules.set_item("qoqo.measurements", module.getattr("measurements")?)?;
    Ok(())
}