>>> """
=================================
Connection styles for annotations
=================================

When creating an annotation using `~.Axes.annotate`, the arrow shape can be
controlled via the *connectionstyle* parameter of *arrowprops*. For further
details see the description of `.FancyArrowPatch`.
"""
... 
... import matplotlib.pyplot as plt
... 
... 
... def demo_con_style(ax, connectionstyle):
...     x1, y1 = 0.3, 0.2
...     x2, y2 = 0.8, 0.6
... 
...     ax.plot([x1, x2], [y1, y2], ".")
...     ax.annotate("",
...                 xy=(x1, y1), xycoords='data',
...                 xytext=(x2, y2), textcoords='data',
...                 arrowprops=dict(arrowstyle="->", color="0.5",
...                                 shrinkA=5, shrinkB=5,
...                                 patchA=None, patchB=None,
...                                 connectionstyle=connectionstyle,
...                                 ),
...                 )
... 
...     ax.text(.05, .95, connectionstyle.replace(",", ",\n"),
...             transform=ax.transAxes, ha="left", va="top")
... 
... 
... fig, axs = plt.subplots(3, 5, figsize=(7, 6.3), constrained_layout=True)
... demo_con_style(axs[0, 0], "angle3,angleA=90,angleB=0")
... demo_con_style(axs[1, 0], "angle3,angleA=0,angleB=90")
... demo_con_style(axs[0, 1], "arc3,rad=0.")
... demo_con_style(axs[1, 1], "arc3,rad=0.3")
... demo_con_style(axs[2, 1], "arc3,rad=-0.3")
... demo_con_style(axs[0, 2], "angle,angleA=-90,angleB=180,rad=0")
... demo_con_style(axs[1, 2], "angle,angleA=-90,angleB=180,rad=5")
... demo_con_style(axs[2, 2], "angle,angleA=-90,angleB=10,rad=5")
... demo_con_style(axs[0, 3], "arc,angleA=-90,angleB=0,armA=30,armB=30,rad=0")
... demo_con_style(axs[1, 3], "arc,angleA=-90,angleB=0,armA=30,armB=30,rad=5")
... demo_con_style(axs[2, 3], "arc,angleA=-90,angleB=0,armA=0,armB=40,rad=0")
... demo_con_style(axs[0, 4], "bar,fraction=0.3")
... demo_con_style(axs[1, 4], "bar,fraction=-0.3")
... demo_con_style(axs[2, 4], "bar,angle=180,fraction=-0.2")
... 
... for ax in axs.flat:
...     ax.set(xlim=(0, 1), ylim=(0, 1.25), xticks=[], yticks=[], aspect=1.25)
... fig.set_constrained_layout_pads(wspace=0, hspace=0, w_pad=0, h_pad=0)
... 
... plt.show()
... 
... #############################################################################
... #
... # .. admonition:: References
... #
... #    The use of the following functions, methods, classes and modules is shown
... #    in this example:
... #
... #    - `matplotlib.axes.Axes.annotate`
... #    - `matplotlib.patches.FancyArrowPatch`
...