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, S, l
from proveit.numbers import Sum
from proveit.numbers.summation import al, bl

# build up the expression from sub-expressions
sub_expr1 = [l]
expr = ExprTuple(Sum(index_or_indices = sub_expr1, summand = al, domain = S), Sum(index_or_indices = sub_expr1, summand = bl, domain = S))

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_{l \in S}~a\left(l\right), \sum_{l \in S}~b\left(l\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: 4 operand: 6
2	Operation	operator: 4 operand: 7
3	ExprTuple	6
4	Literal
5	ExprTuple	7
6	Lambda	parameter: 18 body: 8
7	Lambda	parameter: 18 body: 9
8	Conditional	value: 10 condition: 12
9	Conditional	value: 11 condition: 12
10	Operation	operator: 13 operand: 18
11	Operation	operator: 14 operand: 18
12	Operation	operator: 16 operands: 17
13	Variable
14	Variable
15	ExprTuple	18
16	Literal
17	ExprTuple	18, 19
18	Variable
19	Variable