def extract_bower_zipfile(self, zip_file, dest, expected_version=None):
        bower_json = None
        root = None
        deps_installed = []
        for info in zip_file.infolist():
            if PurePath(info.filename).name == "bower.json":
                with zip_file.open(info) as f:
                    bower_json = json.load(f)
                    root = str(PurePath(info.filename).parent)
                break
        version = bower_json["version"]
        if expected_version is not None:
            expected_version = Bower.clean_semver(expected_version)
            if not semver.match(version, expected_version):
                click.secho("error: versions do not match ({} =/= {})".format(
                    version, expected_version))
                raise InvalidPackageError
        if "dependencies" in bower_json:
            for package, version in bower_json["dependencies"].items():
                url = Bower.get_package_url(package)
                deps_installed.extend(self.get_bower_package(
                    url, dest=dest, version=version))
        ignore_patterns = [GitIgnorePattern(ig) for ig in bower_json["ignore"]]
        path_spec = PathSpec(ignore_patterns)
        namelist = [path for path in zip_file.namelist()
                    if PurePath(path).parts[0] == root]
        ignored = list(path_spec.match_files(namelist))
        for path in namelist:
            dest_path = PurePath(
                bower_json["name"],
                *PurePath(path).parts[1:])

            if path in ignored:
                continue

            for path in ignored:
                for parent in PurePath(path):
                    if parent in ignored:
                        continue

            if path.endswith("/"):
                if list(path_spec.match_files([str(dest_path)])):
                    ignored.append(PurePath(path))
                elif not (dest / dest_path).is_dir():
                    (dest / dest_path).mkdir(parents=True)
            else:
                target_path = dest / dest_path.parent / dest_path.name
                source = zip_file.open(path)
                target = target_path.open("wb")
                with source, target:
                    shutil.copyfileobj(source, target)
        deps_installed.append((bower_json["name"], bower_json["version"]))
        return deps_installed
def mtpv(pmrel, u1max, i1max, title='', projection='', ax=0):
    """create a line or surface plot with voltage and mtpv curve"""
    w1 = pmrel.w2_imax_umax(i1max, u1max)
    nsamples = 20
    if projection == '3d':
        nsamples = 50

    iqmax, idmax = pmrel.iqdmax(i1max)
    iqmin, idmin = pmrel.iqdmin(i1max)
    id = np.linspace(idmin, idmax, nsamples)
    iq = np.linspace(iqmin, iqmax, nsamples)
    u1_iqd = np.array(
        [[np.linalg.norm(pmrel.uqd(w1, iqx, idx))/np.sqrt(2)
          for idx in id] for iqx in iq])
    u1 = np.mean(u1_iqd)
    imtpv = np.array([pmrel.mtpv(wx, u1, i1max)
                      for wx in np.linspace(w1, 20*w1, nsamples)]).T

    if projection == '3d':
        torque_iqd = np.array(
            [[pmrel.torque_iqd(x, y)
              for y in id] for x in iq])
        ax = idq_torque(id, iq, torque_iqd, ax)
        ax.plot(imtpv[1], imtpv[0], imtpv[2],
                color='red', linewidth=2)
    else:
        if ax == 0:
            ax = plt.gca()
        ax.set_aspect('equal')
        x, y = np.meshgrid(id, iq)
        CS = ax.contour(x, y, u1_iqd, 4, colors='b')  # linestyles='dashed')
        ax.clabel(CS, fmt='%d', inline=1)

        ax.plot(imtpv[1], imtpv[0],
                color='red', linewidth=2,
                label='MTPV: {0:5.0f} Nm'.format(np.max(imtpv[2])))
        # beta = np.arctan2(imtpv[1][0], imtpv[0][0])
        # b = np.linspace(beta, 0)
        # ax.plot(np.sqrt(2)*i1max*np.sin(b), np.sqrt(2)*i1max*np.cos(b), 'r-')

        ax.grid()
        ax.legend()
    ax.set_xlabel('Id/A')
    ax.set_ylabel('Iq/A')
    if title:
        ax.set_title(title)