arr = FancyArrowPatch(posA=[0, 1],
posB=[0, 0],
path=None,
arrowstyle='simple',
arrow_transmuter=None,
connectionstyle='arc3',
connector=None,
patchA=None,
patchB=None,
shrinkA=2.0,
shrinkB=2.0,
mutation_scale=1.0,
mutation_aspect=None,
dpi_cor=1.0)
arr.set_connectionstyle("arc,angleA=0,armA=30,rad=10")
ax.add_patch(arr)
# common_opts = dict(arrowstyle=u'->', lw=3)
# arrow_patch_0 = FancyArrowPatch(posA=(0.2, 0.8), posB=(0.8, 0.65),
# mutation_scale=50, **common_opts)
# arrow_patch_1 = FancyArrowPatch(posA=(0.2, 0.2), posB=(0.8, 0.45),
# mutation_scale=150, **common_opts)
# ax.text(0.2, 0.85, "mutation_scale = 50", ha='left', va='bottom')
# ax.text(0.2, 0.15, "mutation_scale = 150", ha='left', va='top')
# for arrow_patch in [arrow_patch_0, arrow_patch_1]:
# ax.add_patch(arrow_patch)
## Axis limits
ax.set_xlim(-1, +1)
