Expression of type ExprTuple

from the theory of proveit.numbers.number_sets.integers

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, a
from proveit.logic import And, InSet, NotEquals
from proveit.numbers import Natural, NaturalPos, zero

# build up the expression from sub-expressions
expr = ExprTuple(Lambda(a, Conditional(InSet(a, NaturalPos), And(InSet(a, Natural), NotEquals(a, zero)))))

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 \mapsto \left\{a \in \mathbb{N}^+ \textrm{ if } a \in \mathbb{N} ,  a \neq 0\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: 17 body: 3
2	ExprTuple	17
3	Conditional	value: 4 condition: 5
4	Operation	operator: 12 operands: 6
5	Operation	operator: 7 operands: 8
6	ExprTuple	17, 9
7	Literal
8	ExprTuple	10, 11
9	Literal
10	Operation	operator: 12 operands: 13
11	Operation	operator: 14 operands: 15
12	Literal
13	ExprTuple	17, 16
14	Literal
15	ExprTuple	17, 18
16	Literal
17	Variable
18	Literal