Partially apply a string equality function

Question

From what I understand I can compare strings with is and ==. Is there a way I can partially apply these functions?

For example:

xs = ["hello", "world"]
functools.filter(functools.partial(is, "hello"), xs)

Gives me:

functools.filter(functools.partial(is, "hello"), xs)
                                    ^
SyntaxError: invalid syntax

Answer 1

You could use operator.eq:

import operator
import functools
xs = ["hello", "world"]
functools.filter(functools.partial(operator.eq, "hello"), xs)

yields

['hello']

operator.eq(a, b) is equivalent to a == b.