Accessing your QLattice

by: Kevin Broløs & Tom Jelen
(Feyn version 1.4 or newer)

You can provide your credentials to a QLattice in two different ways:

• In the connect_qlattice() function parameters.
• From a configuration file.

The simplest way is the first option. Here's an example:

import feyn
ql = feyn.connect_qlattice(qlattice="a1b2c3d4",
                    api_token="c1a2c3a406d6e6729012e0de4d8c7a2c")

If you don't have your credentials, here's how to find them in the QManager

Setting up and using a config file

We recommend setting up a config file, so you can share code with others without revealing your token.

On Linux or OS X, the config file should be called .feynrc and saved in your home folder or .config subfolder.

On Windows, the config file should instead be called feyn.ini.

A config file is structured like the example below:

[QuesadillaLattice]
qlattice = a1b2c3d4
api_token = c1a2c3a406d6e6729012e0de4d8c7a2c

[QuibbleLattice]
qlattice = ...
api_token = ...

Connecting with a config

You connect to the QLattice with the connect_qlattice() function. If you have a config defined, the first QLattice in the list is used by default. You can use the config option to use a specific one.

An example:

import feyn
# Using the default (QuesadillaLattice) section.
ql = feyn.connect_qlattice()

# Using a specific section
ql = feyn.connect_qlattice(config="QuibbleLattice")