Expression of type ExprTuple

from the theory of proveit.logic.booleans.conjunction

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 B, ExprTuple, n
from proveit.core_expr_types import C_1_to_n, Len
from proveit.numbers import Add, one

# build up the expression from sub-expressions
expr = ExprTuple(Len(operands = [B, C_1_to_n]), Add(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(|\left(B,C_{1}, C_{2}, \ldots, C_{n}\right)|, 1 + n\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: 3 operands: 4
2	Operation	operator: 5 operands: 6
3	Literal
4	ExprTuple	7, 8
5	Literal
6	ExprTuple	10, 11
7	Variable
8	ExprRange	lambda_map: 9 start_index: 10 end_index: 11
9	Lambda	parameter: 15 body: 12
10	Literal
11	Variable
12	IndexedVar	variable: 13 index: 15
13	Variable
14	ExprTuple	15
15	Variable