Expression of type ExprTuple

from the theory of proveit.statistics

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 Conditional, ExprTuple, Lambda, Ry, X, fy, y
from proveit.logic import And, InSet

# build up the expression from sub-expressions
expr = ExprTuple(Lambda(y, Conditional(fy, And(InSet(y, X), Ry))))

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(y \mapsto \left\{f\left(y\right) \textrm{ if } y \in X ,  R\left(y\right)\right..\right)

stored_expr.style_options()

no style options

# display the expression information
stored_expr.expr_info()

	core type	sub-expressions	expression
0	ExprTuple	1
1	Lambda	parameter: 15 body: 2
2	Conditional	value: 3 condition: 4
3	Operation	operator: 5 operand: 15
4	Operation	operator: 6 operands: 7
5	Variable
6	Literal
7	ExprTuple	8, 9
8	Operation	operator: 10 operands: 11
9	Operation	operator: 12 operand: 15
10	Literal
11	ExprTuple	15, 14
12	Variable
13	ExprTuple	15
14	Variable
15	Variable