Expression of type ExprTuple

from the theory of proveit.core_expr_types.tuples

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 ExprRange, ExprTuple, IndexedVar, Variable, a, n, x, y
from proveit.logic import Equals
from proveit.numbers import one

# build up the expression from sub-expressions
sub_expr1 = Variable("_a", latex_format = r"{_{-}a}")
sub_expr2 = IndexedVar(x, sub_expr1)
expr = ExprTuple(Equals(a, a), Equals(y, y), ExprRange(sub_expr1, Equals(sub_expr2, sub_expr2), one, n))

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 = a, y = y,\left(x_{1} = x_{1}\right), \left(x_{2} = x_{2}\right), \ldots, \left(x_{n} = x_{n}\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, 3
1	Operation	operator: 12 operands: 4
2	Operation	operator: 12 operands: 5
3	ExprRange	lambda_map: 6 start_index: 7 end_index: 8
4	ExprTuple	9, 9
5	ExprTuple	10, 10
6	Lambda	parameter: 17 body: 11
7	Literal
8	Variable
9	Variable
10	Variable
11	Operation	operator: 12 operands: 13
12	Literal
13	ExprTuple	14, 14
14	IndexedVar	variable: 15 index: 17
15	Variable
16	ExprTuple	17
17	Variable