def install_bower(self, package, save=True, save_dev=False):
        """Installs a bower package.

        :param save: if `True`, pins the package to the Hydrogen requirements
            YAML file.
        :param save_dev: if `True`, pins the package as a development
            dependency to the Hydrogen requirements YAML file.
        :param return: a list of tuples, containing all installed package names
            and versions, including any dependencies.
        """
        requirement = Requirement.coerce(package)
        url = Bower.get_package_url(requirement.package)

        installed = []
        for name, _ in self.get_bower_package(url):
            installed.append(Requirement(name, requirement.version))

        for requirement in installed:
            if save:
                self.requirements["bower"].add(requirement, replace=True)
            if save_dev:
                self.requirements["bower-dev"].add(requirement, replace=True)
            success("installed {}".format(str(requirement)))
        if save or save_dev:
            self.requirements.save()
        return installed
def mmf_fft(f, title='', mmfmin=1e-2, ax=0):
    """plot winding mmf harmonics"""
    if ax == 0:
        ax = plt.gca()
    if title:
        ax.set_title(title)
    else:
        ax.set_title('MMF Harmonics')
    ax.grid(True)
    order, mmf = np.array([(n, m) for n, m in zip(f['nue'],
                                                  f['mmf_nue']) if m > mmfmin]).T
    try:
        markerline1, stemlines1, _ = ax.stem(order, mmf, '-.', basefmt=" ",
                                             use_line_collection=True)
        ax.set_xticks(order)
    except ValueError:  # empty sequence
        pass