Show error bar caps.
  
    Seaborn paper style hides error bar caps. Call this function on an axes
    object to make them visible again.

def ShowErrorBarCaps(ax):
    """Show error bar caps.
  
    Seaborn paper style hides error bar caps. Call this function on an axes
    object to make them visible again.
    """
    for ch in ax.get_children():
        if str(ch).startswith('Line2D'):
            ch.set_markeredgewidth(1)
            ch.set_markersize(8)