README.md says (example "Pure python quantum computing machinery"):

qc.measure("q1")
qc.measure("q2")
Probability.pretty_print_probabilities(qc.qubits.get_quantum_register_containing("q1").get_state())

If you do so, the last line always output:

|psi>=|00>
Pr(|00>)=1.000000; 
<state>=1.000000

Because measurement destroyed the state. IMHO, it should be get_noop in

Thank you for your bug report!

Please fill out the following template.

PLATFORM (Mac, PC, Linux, other):

Mac, jupyter

OPERATING SYSTEM (eg OSX 10.7, Windows 8.1):

10.14.6

SEVERITY (Critical? Major? Minor? Enhancement?):

Minor enhancement

DESCRIPTION:

• What were you trying to do?
  Plot flow histograms.
• What happened?
  Plots sorted in non-natural sorting or