Python API Client IBM Quantum Experience

The official API Client to use IBM Quantum Experience in Python.

This package can be used in Jupyter Notebook.

• Installation
• Getting Started
• Methods
• GIST Jupyter
• Reference

Installation

You can install me using pip or easy_install. For example, from the command line:

$ pip install IBMQuantumExperience

To install the package in Jupyter, you have to run in a Notebook:

import pip
def install(package):
   pip.main(['install', package])
install('IBMQuantumExperience')

or, if you want the standard output, one could even use the exclamation point:

! pip install IBMQuantumExperience

Getting Started

Now it's time to begin doing real work with Python and IBM Quantum Experience.

First, import our API Client:

from IBMQuantumExperience import IBMQuantumExperience

Then, initialize your IBM Quantum Experience connection by supplying your token. You can obtain the token from My Account area of Quantum Experience Platform in Personal Access Token section.

api = IBMQuantumExperience("543...9df")

The constructor takes also other optional arguments. The dictionary config allows with extra options to customize the connection (like the url of the API). The boolean verify checks for SSL certificate errors:

api = IBMQuantumExperience("543...9df", config = {"url":"https://..."}, verify=False)

By default, the config parameter is defined like:

config = {
   "url": 'https://quantumexperience.ng.bluemix.net/api'
}

But the config parameter can be store the access_token and the user_id to avoid login with API Token if you know this values. Also all methods can be receives the access_token and the user_id. Also you can set the client_application to know what client is using the QX Platform. By Default the client is set to the this general api python.

If verify is set to False, ignore SSL certificate errors:

verify = True

Methods

User Info

To get the information about the credits of the user, you only need call to:

api.get_my_credits()

Codes

To get the information of a Code, including the last executions about this Code, you only need the codeId:

api.get_code("id_code")

To get the information about the last Codes, including the last executions about these Codes, you only need call:

api.get_last_codes()

Execution

To get all information (including the Code information) about a specific Execution of a Code, you only need the executionId:

api.get_execution("id_execution")

To get only the Result about a specific Execution of a Code, you only need the executionId:

api.get_result_from_execution("id_execution")

Running QASM 2.0

To execute a QASM 2.0 experiment:

api.run_experiment(qasm, device, shots, name=None, timeout=60)

• qasm: The QASM 2.0 code to run. Eg: qasm = 'OPENQASM 2.0;\n\ninclude "qelib1.inc";\nqreg q[5];\ncreg c[5];\nh q[0];\ncx q[0],q[2];\nmeasure q[0] -> c[0];\nmeasure q[2] -> c[1];\n'
• backend: Type of backend to run the experiment. Options: simulator, or real backends (You can use the available_backends() method to get the availables backends), those are the real chips of 5 qubits. Eg: device = 'simulator'
• shots: Number of shots of the experiments. Maximum 8192 shots. Eg: shots = 1024
• name: Name of the experiment. This paramater is optional, by default the name will be 'Experiment #YmdHMS'. Eg: ```name = 'bell state experiment'``
• timeout: Time to wait for the result. The maximum timeout is 300. If the timeout is reached, you obtain the executionId to get the result with the getResultFromExecution method in the future. Eg: timeout = 120

Running Jobs QASM 2.0

To execute jobs about QASM 2.0 experiments:

api.run_job(qasms, backend, shots, max_credits)

• qasms: A list of objects with the QASM 2.0 information. Eg:

[
   { 'qasm': 'OPENQASM 2.0;\n\ninclude "qelib1.inc";\nqreg q[5];\ncreg c[5];\nh q[0];\ncx q[0],q[2];\nmeasure q[0] -> c[0];\nmeasure q[2] -> c[1];\n'},
   { 'qasm': 'OPENQASM 2.0;\n\ninclude "qelib1.inc";\nqreg q[5];\ncreg c[5];\nx q[0];\nmeasure q[0] -> c[0];\n'}
]

• backend: Type of backend to run the experiment. Options: simulator, or real backends (You can use the available_backends() method to get the availables backends). Eg: device = 'simulator'
• shots: Number of shots of the experiments. Maximum 8192 shots. Eg: shots = 1024
• max_credits: Maximum number of the credits to spend in the executions. If the executions are more expensives, the job is aborted. Eg: max_credits = 3

To get job information:

api.get_job(id_job)

• id_job: The identifier of the Job. Eg:

    id_job = '9de64f58316db3eb6db6da53bf9135ff'

To get all jobs information:

• limit: Number of jobs returned. Eg: limit=5

api.get_jobs(limit)

Get information about a Device

To know the status (if it is running or in maintenance) of a device (real chip 5Q by default) you can run:

api.backend_status(backend)

• backend: The backend to get its availability. By default is the 5 Qubits Real Chip. Eg: backend='ibmqx4'

Get Calibration of a Backend

To know the last calibration of a backend (real chip 5Q by default) you can run:

api.backend_calibration(backend)

• backend: The backend to get its last calibration. By default is the 5 Qubits Real Chip. Eg: device='ibmqx4'

Get Parameters Calibration of a Backend

To know the last parameters of calibration of a backend (real chip 5Q by default) you can run:

api.backend_parameters(backend)

• backend: The backend to get its last calibration. By default is the 5 Qubits Real Chip. Eg: device='ibmqx4'

Get Available Devices

To know the devices where you can run (by name):

api.available_backends()

Get QX API Version

To know the version of the QX API:

api.api_version()

Deploy and Test

If you want participate in the project, you can clone the repository and install the dependencies to run it.

You can do a pull request to improve or add any functionality.

You can run the tests under test folder. See the test/README file to more information.

Reference

IBM Quantum Experience Tutorial

IBM Quantun Experience Community

OPENQASM