code: def plot_series(filename, plot_kwargs=None):
      '''Plot series data from MonitorSeries output text file.
  
      Args:
          filename (str): Path to *.series.txt file produced by :obj:`~nnabla.MonitorSeries` class.
          plot_kwags (dict, optional):
              Keyward arguments passed to :function:`matplotlib.pyplot.plot`.
  
      Note:
          matplotlib package is required.
  
      '''
      import matplotlib.pyplot as plt
  
      if plot_kwargs is None:
          plot_kwargs = {}
  
      data = np.genfromtxt(filename, dtype='i8,f4', names=['k', 'v'])
      index = data['k']
      values = data['v']
      plt.plot(index, values, **plot_kwargsf plot_series(filename, plot_kwargs=None):
      '''Plot series data from MonitorSeries output text file.
  
      Args:
          filename (str): Path to *.series.txt file produced by :obj:`~nnabla.MonitorSeries` class.
          plot_kwags (dict, optional):
              Keyward arguments passed to :function:`matplotlib.pyplot.plot`.
  
      Note:
          matplotlib package is required.
  
      '''
      import matplotlib.pyplot as plt
  
      if plot_kwargs is None:
          plot_kwargs = {}
  
      data = np.genfromtxt(filename, dtype='i8,f4', names=['k', 'v'])
      index = data['k']
      values = data['v']
      plt.plot(index, values, **plot_kwargs)
docs: Plot series data from MonitorSeries output text file.
  
      Args:
          filename (str): Path to *.series.txt file produced by :obj:`~nnabla.MonitorSeries` class.
          plot_kwags (dict, optional):
              Keyward arguments passed to :function:`matplotlib.pyplot.plot`.
  
      Note:
          matplotlib package is required.