My coding cheatsheet
I still Google how to create matplotlib figures with two subplots. This ends today!
Python in general
Check directory
To check for the current working directory
import os
os.getcwd()
Import .py files
Switch to a certain directory
import os
os.chdir('/path/to/that/directory')
Array and .pkl
Say I have an $n$-dimensional array and I want to save it as a storable file, in this case .pkl
import pickle
with open('pkl_name.pkl', 'wb') as f:
pickle.dump(array_name, f)
To convert a .pkl to an $n$-dimensional array
import numpy
array_name = np.load('pkl_name.pkl', allow_pickle=True)
Qiskit
Pulse specifications
For example, to look at the parameters of a default $\pi$ pulse on qubit = 0.
qubit = 0
x_default = backend.defaults().instruction_schedule_map.get('x', qubits = [qubit])
x_default_pulse = x_default.instructions[qubit][1].pulse
print(f"Amplitude = {x_default_pulse.amp}. DRAG coefficient = {x_default_pulse.beta}. Duration = {x_default_pulse.duration}. Sigma = {x_default_pulse.sigma}")
Next time, we'll talk about "How a spherically symmetric cow is different from a symmetrically spherical cow."