Use the QDK for quantum computing with Q# and Python

• 02/01/2021
• 3 Minuten Lesedauer
• • B
  • d
  • g
  • c

Learn how to install the Quantum Development Kit (QDK) to develop Python host programs that call Q# operations.

Install the qsharp Python package

That's it! You now have both the qsharp Python package and the IQ# kernel for Jupyter, which provide the core functionality for compiling and running Q# operations from Python and allows you to use Q# Jupyter Notebooks.

Choose your IDE

While you can use Q# with Python in any IDE, we highly recommend using Visual Studio Code (VS Code) IDE for your Q# + Python applications. With the QDK Visual Studio Code extension you gain access to richer functionality such as warnings, syntax highlighting, project templates, and more.

If you would like to use VS Code:

• Install VS Code (Windows, Linux and Mac).
• Install the QDK extension for VS Code.

If you would like to use a different editor, the instructions above have you all set.

Write your first Q# program

Now you are ready to verify your qsharp Python package installation by writing and running a simple Q# program.

1. Create a minimal Q# operation by creating a file called Operation.qs and adding the following code to it:

   namespace Qrng {
       open Microsoft.Quantum.Intrinsic;
   
       operation SampleQuantumRandomNumberGenerator() : Result {
           use q = Qubit(); // Allocate a qubit.
           H(q);            // Put the qubit to superposition. It now has a 50% chance of being 0 or 1.
           let r = M(q);    // Measure the qubit value.
           Reset(q);
           return r;
       }
   }
   

2. In the same folder as Operation.qs, create a Python program called host.py to simulate the Q# SampleQuantumRandomNumberGenerator() operation:

   import qsharp
   from Qrng import SampleQuantumRandomNumberGenerator
   
   print(SampleQuantumRandomNumberGenerator.simulate())
   

3. From the environment you created during installation (that is, the conda or Python environment where you installed qsharp), run the program:

   python host.py
   

4. You should see the result of the operation you invoked. In this case, because your operation generates a random result, you will see either 0 or 1 printed on the screen. If you run the program repeatedly, you should see each result approximately half the time.

Next steps

Now that you have tested the Quantum Development Kit in your preferred environment, you can follow this tutorial to write and run your first quantum program.