def get(package_name, pypi_server="https://pypi.python.org/pypi/"):
    """
    Constructs a request to the PyPI server and returns a
    :class:`yarg.package.Package`.

    :param package_name: case sensitive name of the package on the PyPI server.
    :param pypi_server: (option) URL to the PyPI server.

        >>> import yarg
        >>> package = yarg.get('yarg')
        <Package yarg>
    """
    if not pypi_server.endswith("/"):
        pypi_server = pypi_server + "/"
    response = requests.get("{0}{1}/json".format(pypi_server,
                                                 package_name))
    if response.status_code >= 300:
        raise HTTPError(status_code=response.status_code,
                        reason=response.reason)
    if hasattr(response.content, 'decode'):
        return json2package(response.content.decode())
    else:
        return json2package(response.content)