def freeze(h, output_yaml, resolve, groups):
    """Output installed packages."""
    if not groups:
        groups = filter(lambda group: not group.lower().startswith("bower"),
                        h.requirements.keys())
    else:
        groups = [text_type.strip(group) for group in groups.split(",")]

    if output_yaml:
        for requirements in h.requirements.values():
            for requirement in requirements:
                if resolve and not requirement.version:
                    requirement.load_installed_version()
        click.echo(h.requirements.yaml)
    else:
        for group in groups:
            if not h.requirements[group]:
                continue
            click.echo("# {}".format(group))
            for requirement in h.requirements[group]:
                if resolve and not requirement.version:
                    requirement.load_installed_version()
                click.echo(str(requirement))
def image_url(self, name, override_receipt_id=None):
        """
        We dynamically generate this, since we want it the expiration clock to
        start when the message is created, not when the record is created.

        Arguments:
            name (str): Name of the image (e.g. "photo_id" or "face")

        Keyword Arguments:
            override_receipt_id (str): If provided, use this receipt ID instead
                of the ID for this attempt.  This is useful for reverification
                where we need to construct a URL to a previously-submitted
                photo ID image.

        Returns:
            string: The expiring URL for the image.

        """
        path = self._get_path(name, override_receipt_id=override_receipt_id)
        return self._storage.url(path)