Expression of type ExprTuple

from the theory of proveit.numbers.absolute_value

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, IndexedVar, Lambda, Variable, a, b, c, x

# build up the expression from sub-expressions
sub_expr1 = Variable("_b", latex_format = r"{_{-}b}")
sub_expr2 = Variable("_a", latex_format = r"{_{-}a}")
expr = ExprTuple(Lambda(sub_expr1, a), Lambda(sub_expr1, b), Lambda(sub_expr2, IndexedVar(x, sub_expr2)), Lambda(sub_expr1, c))

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({_{-}b} \mapsto a, {_{-}b} \mapsto b, {_{-}a} \mapsto x_{{_{-}a}}, {_{-}b} \mapsto c\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, 3, 4
1	Lambda	parameter: 12 body: 5
2	Lambda	parameter: 12 body: 6
3	Lambda	parameter: 13 body: 7
4	Lambda	parameter: 12 body: 9
5	Variable
6	Variable
7	IndexedVar	variable: 10 index: 13
8	ExprTuple	12
9	Variable
10	Variable
11	ExprTuple	13
12	Variable
13	Variable