Expression of type NamedExprs

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 NamedExprs, Variable, l, m
from proveit.numbers import Add, Interval, one
from proveit.physics.quantum import var_ket_psi
from proveit.physics.quantum.circuits import Input

# build up the expression from sub-expressions
expr = NamedExprs(("element", Input(state = var_ket_psi, part = Variable("_a", latex_format = r"{_{-}a}"))), ("targets", Interval(Add(l, one), Add(l, m))))

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\{ \begin{array}{l}
{\rm element}: \begin{array}{c} \Qcircuit@C=1em @R=.7em{
& \qin{\lvert \psi \rangle~\mbox{part}~{_{-}a}} & \qw 
} \end{array}\\
{\rm targets}: \{l + 1~\ldotp \ldotp~l + m\}\\
\end{array} \right\}

stored_expr.style_options()

no style options

# display the expression information
stored_expr.expr_info()

	core type	sub-expressions	expression
0	NamedExprs	element: 1 targets: 2
1	Operation	operator: 3 operands: 4
2	Operation	operator: 5 operands: 6
3	Literal
4	NamedExprs	state: 7 part: 8
5	Literal
6	ExprTuple	9, 10
7	Variable
8	Variable
9	Operation	operator: 12 operands: 11
10	Operation	operator: 12 operands: 13
11	ExprTuple	15, 14
12	Literal
13	ExprTuple	15, 16
14	Literal
15	Variable
16	Variable