Expression of type ExprTuple

from the theory of proveit.physics.quantum.circuits

import proveit
# Automation is not needed when building an expression:
proveit.defaults.automation = False # This will speed things up.
proveit.defaults.inline_pngs = False # Makes files smaller.
%load_expr # Load the stored expression as 'stored_expr'
# import Expression classes needed to build the expression
from proveit import ExprTuple, b
from proveit.numbers import Abs, Exp, two
from proveit.physics.quantum import Bra, Qmult, var_ket_psi
from proveit.physics.quantum.circuits import qubit_meas
from proveit.statistics import Prob

# build up the expression from sub-expressions
expr = ExprTuple(Prob(qubit_meas), Exp(Abs(Qmult(Bra(b), var_ket_psi)), two))

expr:

# check that the built expression is the same as the stored expression
assert expr == stored_expr
assert expr._style_id == stored_expr._style_id
print("Passed sanity check: expr matches stored_expr")

Passed sanity check: expr matches stored_expr

# Show the LaTeX representation of the expression for convenience if you need it.
print(stored_expr.latex())

\left(\textrm{Pr}\left(\begin{array}{c} \Qcircuit@C=1em @R=.7em{
\qin{\lvert \psi \rangle} & \meter & \qout{\lvert b \rangle}
} \end{array}\right), \left|\langle b \rvert \thinspace \lvert \psi \rangle\right|^{2}\right)

stored_expr.style_options()

name	description	default	current value	related methods
wrap_positions	position(s) at which wrapping is to occur; 'n' is after the nth comma.	()	()	('with_wrapping_at',)
justification	if any wrap positions are set, justify to the 'left', 'center', or 'right'	left	left	('with_justification',)

# display the expression information
stored_expr.expr_info()

	core type	sub-expressions	expression
0	ExprTuple	1, 2
1	Operation	operator: 3 operand: 7
2	Operation	operator: 5 operands: 6
3	Literal
4	ExprTuple	7
5	Literal
6	ExprTuple	8, 9
7	Operation	operator: 10 operands: 11
8	Operation	operator: 12 operand: 17
9	Literal
10	Literal
11	ExprTuple	14, 15, 16
12	Literal
13	ExprTuple	17
14	ExprTuple	18
15	ExprTuple	19
16	ExprTuple	20
17	Operation	operator: 21 operands: 22
18	Operation	operator: 23 operands: 24
19	Operation	operator: 25 operands: 26
20	Operation	operator: 27 operands: 28
21	Literal
22	ExprTuple	29, 30
23	Literal
24	NamedExprs	state: 30
25	Literal
26	NamedExprs	basis: 31
27	Literal
28	NamedExprs	state: 32
29	Operation	operator: 33 operand: 36
30	Variable
31	Literal
32	Operation	operator: 34 operand: 36
33	Literal
34	Literal
35	ExprTuple	36
36	Variable