old_contents: import matplotlib
  import matplotlib.pyplot as plt
  
  def pdplot(pddata, kind='bar', xlabel=None, ylabel=None, title=None, **kwargs):
      ax = pddata.plot(kind=kind, **kwargs)
      plt.axhline(0, color='k')
      if xlabel:
          ax.set_xlabel(xlabel)
      if ylabel:
          ax.set_ylabel(ylabel)
      if title:
          ax.set_title(title, fontsize="xx-large", y=1.04)
  
  
new_contents: import matplotlib
  import matplotlib.pyplot as plt
  
  def pdplot(pddata, kind='bar', xlabel=None, ylabel=None, title=None, **kwargs):
      ax = pddata.plot(kind=kind, **kwargs)
      plt.axhline(0, color='k')
      if xlabel:
          ax.set_xlabel(xlabel)
      if ylabel:
          ax.set_ylabel(ylabel)
      if title:
          ax.set_title(title, fontsize="xx-large", y=1.04)
      return ax
subject: Return the axis, will ya? I want it back!