Setz

Setz is a command line utility used to run set operations on files using python syntax

Installation

pip install setz

Usage

setz "query" [a.txt b.txt ..]

Possible Queries

Set Membership. Test if an element belongs to a set.

"'test' in a"

Set Equality. Test if two sets contain the same elements.

"a == b"

Set Cardinality. Return the number of elements in the set.

"len(a)"

Subset Test. Test if a given set is a subset of another set.

"a < b"

Set Union. Find union of two sets.

"a | b"

Set Intersection. Find intersection of two sets.

"a & b"

Set Complement. Given two sets A and B, find all elements in A that are not in B.

"a - b"

Set Symmetric Difference. Find symmetric difference of two sets.

"a ^ b"

Power Set. Generate all subsets of a set.

"power_set(a)"

Set Cartesian Product. Find A x B.

"product(a, b, ..)"

Disjoint Set Test. Test if two sets are disjoint.

"is_disjoint(a, b, ..)"

Empty Set Test. Test if a given set is empty.

"is_empty(a)"

Minimum. Find the smallest element of a set.

"max(a)"

Maximum. Find the largest element of a set.

"min(a)"

Examples

> setz '"foo" in a' <(echo foo)
1
> setz 'len(a)' <(echo for bar garply)
3
> setz 'a < b' <(echo foo bar baz) <(echo foo bar)
0
> setz 'max(a)' <(echo 9001 10)
9001
> setz 'is_disjoint(a, b, c)' <(echo foo) <(echo bar)   <(echo baz garply)
1
> setz 'a | b' <(echo foo) <(echo baz garply)
garply
foo
baz
> setz 'product(a, b)' <(echo foo bar) <(echo baz garply)
foo, garply
foo, baz
bar, garply
bar, baz
> setz 'power_set(a)' <(echo foo bar garply)
garply
foo
garply, foo
bar
garply, bar
foo, bar
garply, foo, bar