Expression of type ExprTuple

from the theory of proveit.numbers.absolute_value

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 Abs, Complex, zero

# build up the expression from sub-expressions
expr = ExprTuple(Lambda(a, Conditional(NotEquals(Abs(a), zero), And(InSet(a, Complex), 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\{\left|a\right| \neq 0 \textrm{ if } a \in \mathbb{C} ,  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: 18 body: 2
2	Conditional	value: 3 condition: 4
3	Operation	operator: 15 operands: 5
4	Operation	operator: 6 operands: 7
5	ExprTuple	8, 19
6	Literal
7	ExprTuple	9, 10
8	Operation	operator: 11 operand: 18
9	Operation	operator: 13 operands: 14
10	Operation	operator: 15 operands: 16
11	Literal
12	ExprTuple	18
13	Literal
14	ExprTuple	18, 17
15	Literal
16	ExprTuple	18, 19
17	Literal
18	Variable
19	Literal