import matplotlib.pyplot as plt
import mpl_toolkits.axisartist as axisartist

def setup_axes(fig, rect):
    ax = axisartist.Subplot(fig, rect)
    fig.add_axes(ax)

    ax.set_ylim(-0.1, 1.5)
    ax.set_yticks([0, 1])

    #ax.axis[:].toggle(all=False)
    #ax.axis[:].line.set_visible(False)
    ax.axis[:].set_visible(False)

    ax.axis["x"] = ax.new_floating_axis(1, 0.5)
    ax.axis["x"].set_axisline_style("->", size=1.5)

    return ax

fig = plt.figure(figsize=(6,2.5))
fig.subplots_adjust(bottom=0.2, top=0.8)

ax1 = setup_axes(fig, "121")
ax1.axis["x"].set_ticklabel_direction("+")
ax1.annotate("ticklabel direction=$+$", (0.5, 0), xycoords="axes fraction",
             xytext=(0, -10), textcoords="offset points",
             va="top", ha="center")

ax2 = setup_axes(fig, "122")
ax2.axis["x"].set_ticklabel_direction("-")
ax2.annotate("ticklabel direction=$-$", (0.5, 0), xycoords="axes fraction",
             xytext=(0, -10), textcoords="offset points",
             va="top", ha="center")


plt.show()