text: ----------------
  #Getting Started
  ----------------
  
  from qiskit import ClassicalRegister, QuantumRegister, QuantumCircuit
  from qiskit import execute
  
  from qiskit import BasicAer
  
  import numpy as np
  np.set_printoptions(precision=3, supress=True)
  
  -----------
  #Backends
  -----------
  
  backend = BasicAer.get_backend('qasm_simulator')
  
  q = QuantumRegister(1)
  c = ClassicalRegister(1)
  circuit = QuantumCircuit(q, c)
  circuit.measure(q[0], c[0])
  
  job = execute(circuit, backend, shots=100)
  result = job.result()
  result.get_counts(circuit)
  
  
  backend = BasicAer.get_backend('statevector_simulator')
  
  circuit = QuantumCircuit(q, c)
  circuit.iden(q[0])
  job = execute(circuit, backend)
  state = job.result().get_statevector(circuit)
  print(state)
  
  ------------
  #Visualization
  ------------
  
  from qiskit.tools.visualization import circuit_drawer
  q = QuantumRegister(1)
  c = ClassicalRegister(1)
  circuit = QuantumCircuit(q, c)
  circuit.measure(q[0], c[0])
  circuit_drawer(circuit)
  
  from qiskit.tools.visualization import plot_bloch_multivecotr
  backend = BasicAer.get_backend('statevector_simulator')
  circuit = QuantumCircuit(q, c)
  circuit.iden(q[0])
  job = execute(circuit, backend)
  state = job.result().get_statevector(circuit)
  print("Initial state")
  plot_bloch_multivector(state)
  
  circuit.h(q[0])
  job = execute(circuit, backend)
  state = job.result().get_statevector(circuit)
  print("After a Hammard gate")
  plot_bloch_multivector(state)
  
  from qiskit.tools.visualization import plot_histogram
  backend = BasicAer.get_backend('qasm_simulator')
  q = QuantumRegister(1)
  c = ClassicalRegister(1)
  circuit = QuantumCircuit(q, c)
  circuit.measure(q[0], c[0])
  job = execute(circuit, backend, shots=1000)
  print("initial state statistics")
  plot_histogram(job.result().get_counts(circuit))
  
  circuit = QuantumCircuit(q, c)
  circuit.h(q[0])
  circuit.measure(q[0], c[0])
  job = execute(circuit, backend, shots=1000)
  print("Statistics if we apply a Hadamard gate")
  plot_histogram(job.result().get_counts(circuit))
  
  
  
  
  