Expression of type ExprTuple

from the theory of proveit.numbers.modular

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 ExprTuple, N, a, b
from proveit.numbers import ModAbs, subtract

# build up the expression from sub-expressions
expr = ExprTuple(subtract(ModAbs(a, N), ModAbs(b, N)), ModAbs(subtract(a, b), 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|a\right|_{\textup{mod}\thinspace N} - \left|b\right|_{\textup{mod}\thinspace N}, \left|a - b\right|_{\textup{mod}\thinspace 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: 10 operands: 3
2	Operation	operator: 15 operands: 4
3	ExprTuple	5, 6
4	ExprTuple	7, 19
5	Operation	operator: 15 operands: 8
6	Operation	operator: 17 operand: 12
7	Operation	operator: 10 operands: 11
8	ExprTuple	13, 19
9	ExprTuple	12
10	Literal
11	ExprTuple	13, 14
12	Operation	operator: 15 operands: 16
13	Variable
14	Operation	operator: 17 operand: 20
15	Literal
16	ExprTuple	20, 19
17	Literal
18	ExprTuple	20
19	Variable
20	Variable