How to use the setupmeta.to_int function in setupmeta

def test_parsing():
    assert setupmeta.to_int(None) is None
    assert setupmeta.to_int(None, default=2) == 2
    assert setupmeta.to_int("") is None
    assert setupmeta.to_int("foo") is None
    assert setupmeta.to_int(["foo"]) is None
    assert setupmeta.to_int([1]) is None
    assert setupmeta.to_int(1, default=2) == 1
    assert setupmeta.to_int(0, default=2) == 0

def test_parsing():
    assert setupmeta.to_int(None) is None
    assert setupmeta.to_int(None, default=2) == 2
    assert setupmeta.to_int("") is None
    assert setupmeta.to_int("foo") is None
    assert setupmeta.to_int(["foo"]) is None
    assert setupmeta.to_int([1]) is None
    assert setupmeta.to_int(1, default=2) == 1
    assert setupmeta.to_int(0, default=2) == 0

def test_parsing():
    assert setupmeta.to_int(None) is None
    assert setupmeta.to_int(None, default=2) == 2
    assert setupmeta.to_int("") is None
    assert setupmeta.to_int("foo") is None
    assert setupmeta.to_int(["foo"]) is None
    assert setupmeta.to_int([1]) is None
    assert setupmeta.to_int(1, default=2) == 1
    assert setupmeta.to_int(0, default=2) == 0

def test_parsing():
    assert setupmeta.to_int(None) is None
    assert setupmeta.to_int(None, default=2) == 2
    assert setupmeta.to_int("") is None
    assert setupmeta.to_int("foo") is None
    assert setupmeta.to_int(["foo"]) is None
    assert setupmeta.to_int([1]) is None
    assert setupmeta.to_int(1, default=2) == 1
    assert setupmeta.to_int(0, default=2) == 0

def update_sources(self, next_version, commit, push, vdefs):
        modified = []
        for vdef in vdefs.sources:
            if ".py:" not in vdef.source:
                continue

            relative_path, _, target_line = vdef.source.partition(":")
            full_path = setupmeta.project_path(relative_path)
            target_line = setupmeta.to_int(target_line, default=0)

            lines = []
            changed = 0
            line_number = 0
            revised = None
            with io.open(full_path, "rt") as fh:
                for line in fh.readlines():
                    line_number += 1
                    if line_number == target_line:
                        revised = updated_line(line, next_version, vdef)
                        if revised and revised != line:
                            changed += 1
                            line = revised

                    lines.append(line)

def run(self):
        if not self.setupmeta:
            return

        if self.expand:
            return self.show_expanded_python()

        if self.dependencies:
            return self.show_dependencies()

        self.chars = setupmeta.to_int(self.chars, default=setupmeta.Console.columns())

        definitions = self.setupmeta.definitions
        self.check_recommend("name")
        self.check_recommend("version", "you can use setupmeta's versioning='...'")
        self.check_recommend("description", "add a README or a docstring to your module")
        self.check_recommend("long_description", "add a README file")
        if self.recommend:
            self.check_recommend("author")
            self.check_recommend("classifiers")
            self.check_recommend("download_url")
            self.check_recommend("license")
            self.check_recommend("url")

        if definitions:
            longest_key = min(30, max(len(key) for key in definitions))
            sources = sum((d.sources for d in definitions.values()), [])

def rendered_attr_auto_bumped(self, version):
        """
        :param Version version: Version to render
        :return str: Auto-bumped if possible
        """
        value = self.rendered_attr(version)
        return setupmeta.to_int(value) + 1