util.py 文件源码

def _show_plot(x_values, y_values, x_labels=None, y_labels=None):
    try:
        import matplotlib.pyplot as plt
    except ImportError:
        raise ImportError('The plot function requires matplotlib to be installed.'
                         'See http://matplotlib.org/')

    plt.locator_params(axis='y', nbins=3)
    axes = plt.axes()
    axes.yaxis.grid()
    plt.plot(x_values, y_values, 'ro', color='red')
    plt.ylim(ymin=-1.2, ymax=1.2)
    plt.tight_layout(pad=5)
    if x_labels:
        plt.xticks(x_values, x_labels, rotation='vertical')
    if y_labels:
        plt.yticks([-1, 0, 1], y_labels, rotation='horizontal')
    # Pad margins so that markers are not clipped by the axes
    plt.margins(0.2)
    plt.show()

#////////////////////////////////////////////////////////////
#{ Parsing and conversion functions
#////////////////////////////////////////////////////////////