Expression of type ExprTuple

from the theory of proveit.logic.booleans.negation

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 A, Conditional, ExprTuple, Lambda
from proveit.logic import And, Boolean, InSet, Not

# build up the expression from sub-expressions
expr = ExprTuple(Lambda(A, Conditional(A, And(InSet(A, Boolean), Not(Not(A))))))

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(A \mapsto \left\{A \textrm{ if } A \in \mathbb{B} ,  \lnot (\lnot A)\right..\right)

stored_expr.style_options()

no style options

# display the expression information
stored_expr.expr_info()

	core type	sub-expressions	expression
0	ExprTuple	1
1	Lambda	parameter: 15 body: 2
2	Conditional	value: 15 condition: 3
3	Operation	operator: 4 operands: 5
4	Literal
5	ExprTuple	6, 7
6	Operation	operator: 8 operands: 9
7	Operation	operator: 13 operand: 12
8	Literal
9	ExprTuple	15, 11
10	ExprTuple	12
11	Literal
12	Operation	operator: 13 operand: 15
13	Literal
14	ExprTuple	15
15	Variable