Expression of type ExprTuple

from the theory of proveit.numbers.summation

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, a, k
from proveit.numbers import Add, Interval, Sum, nine, one, subtract, two

# build up the expression from sub-expressions
sub_expr1 = [k]
sub_expr2 = subtract(k, two)
expr = ExprTuple(Sum(index_or_indices = sub_expr1, summand = sub_expr2, domain = Interval(a, nine)), Add(Sum(index_or_indices = sub_expr1, summand = sub_expr2, domain = Interval(a, subtract(nine, one))), subtract(nine, 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(\sum_{k = a}^{9} \left(k - 2\right), \left(\sum_{k = a}^{9 - 1} \left(k - 2\right)\right) + \left(9 - 2\right)\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: 9 operand: 5
2	Operation	operator: 33 operands: 4
3	ExprTuple	5
4	ExprTuple	6, 7
5	Lambda	parameter: 25 body: 8
6	Operation	operator: 9 operand: 13
7	Operation	operator: 33 operands: 11
8	Conditional	value: 18 condition: 12
9	Literal
10	ExprTuple	13
11	ExprTuple	35, 24
12	Operation	operator: 22 operands: 14
13	Lambda	parameter: 25 body: 16
14	ExprTuple	25, 17
15	ExprTuple	25
16	Conditional	value: 18 condition: 19
17	Operation	operator: 28 operands: 20
18	Operation	operator: 33 operands: 21
19	Operation	operator: 22 operands: 23
20	ExprTuple	31, 35
21	ExprTuple	25, 24
22	Literal
23	ExprTuple	25, 26
24	Operation	operator: 37 operand: 30
25	Variable
26	Operation	operator: 28 operands: 29
27	ExprTuple	30
28	Literal
29	ExprTuple	31, 32
30	Literal
31	Variable
32	Operation	operator: 33 operands: 34
33	Literal
34	ExprTuple	35, 36
35	Literal
36	Operation	operator: 37 operand: 39
37	Literal
38	ExprTuple	39
39	Literal